Networking Calculators
IP addressing, subnets, bandwidth, wireless, fiber, security and cloud networking tools.
368 of 368 available now
IP Addressing
IPv4 CalculatorCalculate network address, broadcast address, host range and subnet mask for any IPv4 address.IPv6 CalculatorExpand, compress and analyze IPv6 addresses including prefix and interface identifier breakdown.CIDR CalculatorConvert CIDR notation into network address, subnet mask, broadcast address and usable host count.Subnet CalculatorDivide an IP network into subnets and view addressing details for each resulting subnet.VLSM CalculatorAllocate variable-length subnets efficiently across a network based on per-subnet host requirements.FLSM CalculatorSplit a network into equal-sized fixed-length subnets and list each subnet's address range.Supernet CalculatorAggregate multiple contiguous networks into a single supernet with the smallest matching prefix.Broadcast Address CalculatorFind the broadcast address of a network from its IP address and subnet mask.Network Address CalculatorDetermine the network address of a subnet from an IP address and mask or prefix length.First Host CalculatorFind the first usable host address in an IP subnet.Last Host CalculatorFind the last usable host address in an IP subnet.Host Count CalculatorCalculate the number of usable host addresses available in a subnet.Subnet Count CalculatorCalculate how many subnets can be created from a network with a given prefix length.Wildcard Mask CalculatorConvert a subnet mask into its wildcard mask equivalent for ACLs and OSPF.Network Prefix CalculatorConvert between subnet masks and CIDR prefix lengths in either direction.Reverse IP Lookup CalculatorGenerate the reverse DNS (PTR) lookup format for an IPv4 or IPv6 address.Binary IP ConverterConvert an IPv4 address between dotted-decimal and binary notation.Decimal IP ConverterConvert an IPv4 address to and from its 32-bit decimal integer representation.Hex IP ConverterConvert an IPv4 or IPv6 address between dotted notation and hexadecimal.Octal IP ConverterConvert an IPv4 address between dotted-decimal and octal notation.Subnet Mask CalculatorConvert a CIDR prefix length into its dotted-decimal subnet mask, wildcard mask and usable host count.IP Range CalculatorWork out the first and last address of a CIDR block, and how many addresses the range contains.Usable IP CalculatorCount how many addresses in a subnet you can actually assign after network, broadcast and infrastructure reservations.Private/Public IP CalculatorClassify any IPv4 address as private, public, loopback, link-local, CGNAT, multicast or reserved.CIDR Merge CalculatorMerge consecutive CIDR blocks into a single aggregate and check that the starting network is correctly aligned.
IPv6
IPv6 Prefix CalculatorBreak an IPv6 prefix into its network portion, available subnet count and address capacity.IPv6 Address Compression CalculatorCompress a full IPv6 address to its shortest RFC 5952 form and see exactly how many characters are saved.IPv6 Expansion CalculatorExpand a compressed IPv6 address into all eight 16-bit groups with leading zeros restored.IPv6 Network CalculatorDerive the IPv6 network address, prefix boundary and subnet identifier for any address and prefix length.IPv6 Host Range CalculatorShow the first and last address inside an IPv6 prefix along with the size of the address space it covers.IPv6 Prefix Length CalculatorChoose the right IPv6 prefix length for a required number of subnets and see how much headroom is left.IPv6 Interface ID CalculatorSplit an IPv6 address into its network prefix and 64-bit interface identifier, with the identifier type flagged.EUI-64 CalculatorConvert a 48-bit MAC address into its modified EUI-64 interface identifier and the resulting IPv6 address.IPv6 Binary ConverterConvert an IPv6 address into its full 128-bit binary form, group by group, with the prefix boundary marked.IPv6 Hex ConverterTurn an IPv6 address into a bare 32-digit hex string, 0x literal and reverse-DNS nibble format.IPv6 Multicast CalculatorBuild an IPv6 multicast address from a scope and group ID, and decode what the flag and scope fields mean.IPv6 Anycast CalculatorPlan IPv6 anycast service addresses across sites and estimate the routing spread each instance serves.IPv6 Link-Local CalculatorDerive the fe80::/10 link-local address a host will use from its MAC address, with the zone identifier.IPv6 ULA CalculatorBuild an RFC 4193 unique local address prefix from a global ID and see how many subnets it yields.Dual Stack PlannerCompare IPv4 and IPv6 capacity for the same network and size the overhead of running both stacks.IPv6 Transition CalculatorProject how long an IPv6 migration will take at the current pace and what remains dual-stacked.NAT64 CalculatorSynthesise the IPv6 address a NAT64 gateway maps an IPv4 destination to, and size the translator's state table.DNS64 CalculatorSize a DNS64 resolver: synthesis rate, cache footprint and the share of queries needing AAAA synthesis.IPv6 Readiness CalculatorScore how ready your estate is for IPv6 across addressing, transport, applications, security and monitoring.
Network Performance
Bandwidth CalculatorCalculate required or available network bandwidth from data size and time.Throughput CalculatorMeasure effective network throughput after accounting for overhead and loss.Packet Loss CalculatorCalculate the packet loss percentage from sent and received packet counts.Latency CalculatorEstimate one-way network latency from distance, medium and processing delay.RTT CalculatorCalculate round-trip time between two network endpoints.Jitter CalculatorCalculate network jitter as the variation in packet delay across a sample.Network Delay CalculatorBreak down total network delay into propagation, transmission, processing and queuing delay.Congestion CalculatorEstimate network congestion level from link utilization and traffic load.Network Efficiency CalculatorCalculate the ratio of useful data throughput to total bandwidth consumed.Goodput CalculatorCalculate goodput — the application-level useful data rate excluding retransmissions and overhead.Network Performance Health Score CalculatorScore latency, jitter, loss, utilisation and availability into one weighted network health grade.
TCP & Transport
TCP Window Size CalculatorSize the TCP receive window for a given bandwidth and RTT, and find the window scale factor it needs.TCP Retransmission CalculatorApply the Mathis equation to see the throughput ceiling packet loss imposes on a single TCP stream.TCP Slow Start CalculatorTrack how the congestion window doubles each round trip during slow start and when it reaches ssthresh.Congestion Window CalculatorModel the AIMD sawtooth: how far cwnd drops on loss and how many round trips recovery takes.Bandwidth Delay Product CalculatorCompute the bandwidth-delay product: how many bytes are in flight on a link at any instant.Socket Buffer CalculatorSize per-socket send and receive buffers from the BDP, and total the kernel memory a server needs.Connection Capacity CalculatorFind how many TCP connections a host can hold and whether memory, ports or the table is the limit.Session Capacity CalculatorUse Little's law to turn a new-session rate and session lifetime into a firewall session table size.Connection Timeout CalculatorDerive the RFC 6298 retransmission timeout and the total time TCP spends retrying before it gives up.SYN Flood Capacity CalculatorSee how fast a SYN flood exhausts the backlog queue and whether SYN cookies are required.Packets Per Second CalculatorConvert a bit rate into packets per second for a given frame size, including preamble and interframe gap.Flow Count CalculatorEstimate active flows and flow-cache utilisation from host count, flow rate and average flow duration.NIC Throughput CalculatorCompare a NIC's line-rate packet ceiling against what its CPU cores can actually process.Queue Depth CalculatorSize an interface queue for a target latency and check the M/M/1 wait time at your utilisation.Buffer Size CalculatorSize switch or router buffers using the BDP rule or the Stanford BDP over root-N rule for many flows.Traffic Burst CalculatorSize a token bucket: the committed burst size a policer needs to pass a burst without dropping it.
Data Transfer
File Transfer TimeEstimate how long a file transfer will take at a given connection speed.Download TimeCalculate how long a download will take based on file size and internet speed.Upload TimeCalculate how long an upload will take based on file size and upload speed.Internet Speed CalculatorConvert internet speed between Mbps, MB/s and GB/hour and estimate transfer times.Data Usage CalculatorEstimate data consumption for browsing, streaming and downloads over a period.Monthly Bandwidth UsageProject total monthly bandwidth consumption from daily usage patterns.Peak Bandwidth CalculatorEstimate peak bandwidth demand from concurrent users and per-user usage.Average ThroughputCalculate the average data throughput over a transfer session or time window.Compression RatioCalculate the compression ratio and space savings between original and compressed data sizes.Network UtilizationCalculate the percentage of available link capacity currently in use.
Ethernet & Switching
VLAN CalculatorPlan VLAN IDs, subnets and trunking assignments across switches.Trunk BandwidthCalculate the aggregate and per-VLAN bandwidth carried on an Ethernet trunk link.STP CostCalculate Spanning Tree Protocol port cost based on link speed and STP version.MAC Address ConverterConvert MAC addresses between colon, hyphen, dot and raw hex notations.MAC Vendor LookupIdentify the hardware vendor associated with a MAC address OUI prefix.Jumbo Frame CalculatorCalculate throughput and overhead gains from enabling jumbo frames on a link.MTU CalculatorCalculate the optimal maximum transmission unit for a network path.MSS CalculatorCalculate TCP maximum segment size from MTU and header overhead.Ethernet OverheadCalculate Ethernet framing overhead and its impact on effective throughput.Frame Size CalculatorCalculate total Ethernet frame size including headers, payload and trailer.Frame Check Sequence CalculatorSize the 4-byte Ethernet FCS, count the bits it protects and estimate how many corrupt frames slip past CRC-32.Ethernet Throughput CalculatorTurn a line rate into real frame rate, Layer 2 throughput and TCP goodput after preamble, IFG, headers and FCS.Interframe Gap CalculatorConvert the 96-bit Ethernet interframe gap into nanoseconds at any line rate and see the bandwidth it costs.VLAN ID PlannerAllocate 802.1Q VLAN IDs across sites in aligned blocks and check the plan fits the 4094 usable IDs.VLAN Capacity CalculatorFind whether the VLAN table or the STP logical-interface limit caps how many VLANs a switch can really carry.802.1Q Tag Overhead CalculatorMeasure what a 4-byte 802.1Q tag or an 8-byte QinQ stack costs in frame size, MTU and bandwidth.Port Channel Capacity CalculatorSize a LAG: aggregate bandwidth, capacity after a member fails and the single-flow ceiling hashing imposes.LACP Distribution CalculatorCheck how evenly a LAG hash spreads flows across members and how much skew a non-power-of-two bundle causes.RSTP Path Cost CalculatorWork out 802.1D/802.1w port and root path costs using the long or short cost table, including aggregated links.MSTP Instance CalculatorMap VLANs onto MST instances and see how much spanning-tree state MSTP saves against per-VLAN spanning tree.BPDU Timer CalculatorValidate STP hello, max-age and forward-delay timers against the IEEE inequalities and get the convergence time.MAC Table Size CalculatorSize a switch CAM table from host count and VLAN membership, and see how long before growth fills it.ARP Table CalculatorSize an ARP cache across VLANs and estimate the broadcast load its refresh cycle puts on every host.Broadcast Domain CalculatorSplit hosts into broadcast domains and check the broadcast bandwidth every NIC in a domain has to absorb.Collision Domain CalculatorCount collision domains in a mixed switch and hub topology, with CSMA/CD slot time and cable diameter limits.Switch Utilization CalculatorCheck access-to-uplink oversubscription, uplink utilisation and whether the switch fabric is truly non-blocking.
Routing
BGP Prefix CalculatorCalculate the number of BGP prefixes and routing table impact for an address block.Route SummarizationSummarize multiple contiguous routes into the smallest covering supernet.OSPF CostCalculate OSPF interface cost from link bandwidth using the reference bandwidth formula.RIP MetricCalculate the RIP hop-count metric for a route and check it against the maximum hop limit.EIGRP MetricCalculate the composite EIGRP metric from bandwidth, delay, reliability and load.ECMP DistributionCalculate how traffic is load-balanced across equal-cost multi-path routes.Next Hop CalculatorDetermine the next-hop gateway for a destination based on the routing table entries.Routing Table SizeEstimate memory and entry requirements for a routing table given prefix counts.Administrative DistanceCompare administrative distances across routing protocols to determine the preferred route.Longest Prefix MatchDetermine which routing table entry wins for a destination using longest prefix match.Static Route CalculatorBuild a static route from a destination and prefix, and see whether its administrative distance beats the dynamic protocol.Route Lookup CalculatorRun longest prefix match over four candidate routes and see exactly which one forwards a given destination.OSPF Neighbor CalculatorCount OSPF adjacencies on any network type and see how much DR/BDR election cuts against a full mesh.OSPF Area PlannerSplit an OSPF domain into areas and size each LSDB, showing what stub and totally-stubby areas filter out.BGP Best Path CalculatorCompare two BGP paths through the real tie-break order and see which attribute decides the winner.BGP Route Reflector PlannerCompare iBGP full-mesh session counts against a route-reflector design and size the sessions each RR carries.BGP Community CalculatorConvert between AS:value and 32-bit BGP community notation, in hex, and identify well-known community values.MPLS MTU CalculatorSize core MTU for an MPLS label stack at 4 bytes per label, including VPN and entropy labels.MPLS LSP CalculatorCount the LSPs a PE mesh needs, the label space they consume and the RSVP-TE refresh load they generate.LDP Session CalculatorSize LDP sessions, label bindings and hello load across an MPLS core using liberal label retention.Segment Routing SID CalculatorDerive prefix-SID labels from an SRGB base and index, and check SRGB utilisation across the domain.SR-MPLS CalculatorCheck an SR-MPLS label stack against platform MSD and MTU, and compare state held versus RSVP-TE.VRF Capacity CalculatorSize VRFs against platform route and VRF limits, with RIB memory and the resource that caps you first.VRF Route Leaking CalculatorMeasure how much route leaking between VRFs amplifies the routing table under hub, mesh or selective policy.Policy-Based Routing CalculatorEstimate matched traffic, ACE evaluations and CPU cost when PBR runs in hardware versus in software.Recursive Route CalculatorTrace recursive next-hop resolution depth, its control-plane cost and the platform recursion limit.Routing Convergence CalculatorAdd up detection, flooding, SPF and FIB installation to get end-to-end routing convergence and the worst term.Failover Time CalculatorWork out failover time from BFD or hello timers plus switchover, and turn it into packet loss and yearly downtime.Route Flap CalculatorApply BGP flap damping: accumulate penalty per flap, compare to the suppress limit and get the suppression time.Routing Health Score CalculatorScore routing health from convergence, table utilisation, flap rate, session state and path redundancy.
DNS & Network Services
DNS Cache CalculatorSize a resolver cache and predict its hit ratio from query rate, unique names and record TTL.DNS Zone Size CalculatorEstimate zone file size, server memory and zone transfer time from your record counts and DNSSEC state.DNS Query Rate CalculatorTurn user population into average and peak DNS query rates and the number of resolvers required.DHCP Lease CalculatorWork out DHCP T1 and T2 renewal timers and the renewal load a client population puts on the server.DHCP Pool Capacity CalculatorCheck whether a DHCP pool has enough addresses once lease overhang and growth headroom are included.NTP Drift CalculatorConvert clock drift in ppm into error per poll interval, per day and across a holdover window.SNMP Polling CalculatorSize SNMP polling load: varbinds per second, PDUs per cycle, bandwidth and daily data points.Syslog Growth CalculatorProject syslog volume and retained storage from device count, message rate, size and compression.NetFlow Storage CalculatorSize NetFlow collector storage and export bandwidth from flow rate, sampling and retention.IPFIX Storage CalculatorSize IPFIX collector storage from template field counts, flow rate, retention and compression.RADIUS Capacity CalculatorSize RADIUS servers from authentication rate, interim accounting load and peak-to-average factor.TACACS+ Session CalculatorEstimate TACACS+ request volume from device count, admin sessions and per-command authorisation.LDAP Query CalculatorSize LDAP directory load: query rate, cache offload, result bandwidth and per-connection query rate.Active Directory Replication CalculatorEstimate AD replication traffic per cycle, site link utilisation and end-to-end convergence time.Service Discovery CalculatorSize a service registry: heartbeat rate, watch notification fan-out and registry memory footprint.mDNS CalculatorEstimate multicast DNS packet rate, bandwidth and wireless airtime cost for a device population.Infrastructure Services Health Score CalculatorScore DNS, DHCP, NTP, AAA and syslog health into one weighted grade and flag the weakest service.
Load Balancing & ADC
Load Balancer Capacity CalculatorSize a load balancer pair from connection arrival rate and hold time, and check the state table against the per-node limit.Round Robin Distribution CalculatorShow exactly how round-robin splits requests across a pool, including the remainder servers and the resulting per-server load.Least Connections CalculatorModel how least-connections balancing shifts new requests away from slow servers, and the arrival rate each member ends up with.Weighted Load Distribution CalculatorTurn pool member weights into request shares, per-pool request counts and the weighted round-robin cycle length.Session Persistence CalculatorSize the persistence table for sticky sessions: concurrent sessions, memory footprint and how long a node takes to drain.SSL Offload Capacity CalculatorSize SSL/TLS offload cores separately for asymmetric handshakes and symmetric bulk encryption, including session resumption.TLS Handshake Rate CalculatorCalculate sustainable TLS handshake rate from core count, key algorithm and resumption rate, plus the round trips setup costs.Reverse Proxy Throughput CalculatorEstimate reverse-proxy throughput, worker CPU utilisation and maximum request rate, with the TLS termination penalty included.NGINX Capacity CalculatorDerive NGINX connection capacity from worker processes and worker_connections, and the proxy buffer memory it commits.HAProxy Capacity CalculatorFind whether HAProxy is limited by frontend maxconn or backend server maxconn, and how long sessions wait in the queue.Application Gateway CalculatorSize a cloud application gateway in capacity units from throughput, new connections and persistent connections, with a WAF uplift.WebSocket Capacity CalculatorSize WebSocket fan-out: servers required, message rate, bandwidth and the memory each long-lived connection pins.HTTP/2 Stream CalculatorWork out HTTP/2 stream concurrency, connections needed and the worst-case flow-control window memory a proxy commits.HTTP/3 QUIC CalculatorCompare HTTP/3 over QUIC against TCP plus TLS: handshake round trips, congestion-window growth and total transfer time.Connection Pool CalculatorSize a database or upstream connection pool with Little's law, and see the queue wait a pool that is too small produces.API Rate Limit CalculatorTest a token-bucket rate limit against real client demand: rejected requests, burst drain time and the per-client allowance.ADC API Gateway Throughput CalculatorSize an API gateway's request ceiling from per-request CPU cost, with uplifts for authentication, transformation and cache hits.CDN Edge Distribution CalculatorSplit CDN load across points of presence and check the origin request rate and egress that survives the cache hit ratio.ADC Traffic Split CalculatorPlan a canary traffic split on the load balancer: canary load, capacity headroom, error-rate delta and whether to widen or roll back.ADC Health Score CalculatorScore an application delivery tier across availability, latency, errors, utilisation, SSL load and persistence, and name the weak spot.
VPN & SD-WAN
VPN Bandwidth CalculatorSize the WAN circuit a remote-access or site-to-site VPN needs once encryption and encapsulation overhead is added.Geneve Overhead CalculatorWork out Geneve encapsulation bytes, the resulting inner MTU and the goodput lost to option TLVs.WireGuard Throughput CalculatorEstimate WireGuard tunnel throughput from link rate, packet size and per-core crypto performance.OpenVPN Performance CalculatorEstimate OpenVPN tunnel throughput and MTU from cipher choice, transport protocol and instance count.SD-WAN Link CalculatorSize the SD-WAN circuit for a branch from user count, concurrency, growth and overlay overhead.SD-WAN Path Selection CalculatorScore two SD-WAN paths on latency, jitter and loss to see which one the policy engine should prefer.Deduplication Savings CalculatorCalculate the data reduction, bandwidth saved and transfer time cut by WAN deduplication and compression.QoS Bandwidth Allocation CalculatorSplit a link into voice, video, business and best-effort classes and check the 33% low-latency queue guideline.Traffic Shaping CalculatorCompute token-bucket shaper parameters — committed burst, excess burst and interval — from CIR and Tc.Traffic Policing CalculatorSplit offered traffic into conforming, exceeding and violating rates for a two-rate three-colour policer.Packet Scheduling CalculatorTurn scheduler weights into a real bandwidth share and estimate serialisation and queueing delay per class.WAN Failover CalculatorAdd up BFD detection, routing convergence and application recovery to get real WAN failover time and downtime.Internet Breakout CalculatorCompare local internet breakout with hub backhaul to see the bandwidth saved at the data centre edge.Overlay Network CalculatorCount tunnels in a mesh or hub-and-spoke overlay and work out the goodput left after encapsulation.Tunnel MTU CalculatorDerive the inner MTU and TCP MSS clamp for any tunnel type from the underlay path MTU.Encapsulation Overhead CalculatorStack VLAN tags, GRE, VXLAN and IPsec to see total per-packet overhead, goodput and remaining MTU.Multi-WAN Capacity CalculatorAggregate up to three WAN circuits and check the capacity that survives the loss of the largest link.Path Health Score CalculatorScore a WAN path out of 100 from latency, jitter, loss and delivered throughput, with an estimated MOS.VPN Health Score CalculatorGrade a VPN tunnel out of 100 using uptime, rekey failures, latency, loss and delivered throughput.
Wireless
WiFi CoverageEstimate WiFi access point coverage radius and area based on power and environment.WiFi CapacityCalculate the number of concurrent devices a WiFi network can support at target throughput.WiFi Channel CalculatorFind non-overlapping WiFi channels and center frequencies for 2.4GHz and 5GHz bands.Signal StrengthCalculate received wireless signal strength from transmit power, distance and path loss.RSSI CalculatorConvert between RSSI dBm values and signal quality percentage for wireless links.SNR CalculatorCalculate the signal-to-noise ratio from signal and noise power levels.Wireless Link BudgetCalculate the complete link budget for a wireless link including gains and losses.Access Point PlanningCalculate the number of access points needed to cover an area with target capacity.Frequency ConverterConvert radio frequencies between Hz, kHz, MHz and GHz and calculate wavelength.Fresnel ZoneCalculate the Fresnel zone radius and clearance needed for a line-of-sight wireless link.Access Point Density CalculatorSize an access point count from both coverage area and client capacity, and see which of the two actually drives the design.Channel Width CalculatorTrade Wi-Fi channel width against PHY rate, noise-floor penalty and how many non-overlapping channels remain for reuse.2.4 GHz Channel PlannerPlan a 2.4 GHz deployment against the only three non-overlapping channels, and see the co-channel contention it creates.5 GHz Channel PlannerCount the non-overlapping 5 GHz channels available at your chosen width with or without DFS, and check the reuse it allows.6 GHz Wi-Fi PlannerPlan 6 GHz Wi-Fi 6E/7: channel count for your regulatory domain, LPI or standard-power EIRP and the resulting cell radius.Roaming Capacity CalculatorWork out roam events per second, concurrent roams and RADIUS authentication load, with and without 802.11r fast transition.Client Density CalculatorCheck clients per radio and per access point against your design target, and see how much spare association capacity is left.Mesh Wi-Fi CalculatorEstimate throughput at the edge of a wireless mesh after per-hop backhaul loss, for shared-radio and dedicated-backhaul designs.Point-to-Point Link CalculatorClose a point-to-point wireless link: free-space path loss, received signal level, EIRP and the fade margin left over.Point-to-Multipoint PlannerPlan a sectorised point-to-multipoint site: subscribers per sector, offered load, azimuth coverage and the subscriber ceiling.Wireless Throughput CalculatorModel real Wi-Fi cell throughput with airtime fairness, so slow legacy clients drag the whole cell down the way they do in practice.Wireless Interference CalculatorTurn signal, co-channel, adjacent-channel and noise-floor levels into SNR, SINR and the modulation the link can actually hold.OFDMA Efficiency CalculatorCompare 802.11ax OFDMA against single-user transmissions: resource units per channel, users per TXOP and the airtime saved.MU-MIMO Capacity CalculatorSize the multi-user MIMO gain from AP and client spatial streams, including group size, sounding overhead and stream utilisation.Beamforming Gain CalculatorWork out array gain, total antenna gain, directivity from beamwidth and the range multiplier a phased array delivers.Coverage Heatmap EstimatorEstimate indoor cell radius, cell area and AP count from EIRP, target RSSI, wall losses and a path-loss exponent.Wireless Health Score CalculatorScore a Wi-Fi estate across coverage, SNR, channel utilisation, retries, roaming and headroom, and find the weakest dimension.
Fiber & Telecom
Fiber Loss BudgetCalculate total optical fiber loss budget from distance, splices and connectors.Optical BudgetCalculate the available optical power budget between transmitter and receiver.dBm to WattConvert optical or RF power between dBm and watts (or milliwatts).Optical PowerCalculate received optical power at a fiber receiver given transmit power and losses.Cable LengthCalculate maximum cable run length for a given medium and signal loss tolerance.OTDR DistanceCalculate fiber fault distance from OTDR trace timing and the fiber's refractive index.RF Link BudgetCalculate the complete radio frequency link budget including all gains and losses.Microwave LinkCalculate microwave point-to-point link feasibility from frequency, distance and antenna specs.Tower CoverageEstimate cell tower coverage radius from antenna height, power and terrain factors.Antenna GainCalculate antenna gain in dBi from aperture size, frequency and efficiency.
Security
Password EntropyCalculate password entropy in bits based on length and character set.Password StrengthEvaluate password strength and estimated crack time based on complexity.Hash RateCalculate hashing throughput and time required to compute a given number of hashes.Encryption OverheadCalculate the bandwidth and latency overhead added by encrypting network traffic.VPN OverheadCalculate the effective throughput loss caused by VPN tunneling and encryption overhead.Firewall Rule EstimatorEstimate the number of firewall rules needed to cover a matrix of sources, destinations and services.TLS OverheadCalculate the latency and bandwidth overhead introduced by TLS handshakes and encryption.SSL Certificate ExpiryCalculate the days remaining until an SSL/TLS certificate expires.Key Length ComparisonCompare cryptographic key lengths across algorithms for equivalent security strength.Brute Force TimeEstimate the time required to brute-force a password or key given attempt speed.
Cloud Networking
AWS VPC CIDRPlan AWS VPC and subnet CIDR blocks accounting for AWS-reserved addresses.Azure VNetPlan Azure virtual network and subnet address ranges accounting for Azure-reserved addresses.GCP VPCPlan Google Cloud VPC subnet ranges and calculate usable IP addresses per subnet.Load Balancer DistributionCalculate how traffic is distributed across backend targets by a load balancer.NAT Gateway CapacityEstimate NAT gateway connection and bandwidth capacity for outbound cloud traffic.Public IP PlannerPlan and allocate public IP address requirements across cloud resources.Private IP PlannerPlan private IP address space allocation across VPCs and subnets.VPN Tunnel CapacityCalculate throughput capacity and tunnel count limits for site-to-site VPN connections.Transit Gateway PlannerPlan transit gateway attachments, routing and bandwidth across connected VPCs.Cloud Network CostEstimate cloud networking costs from data transfer, NAT gateway and load balancer usage.
Miscellaneous
DHCP ScopePlan a DHCP address pool scope and calculate available leases within a subnet.DNS TTLCalculate DNS record cache expiration and propagation timing from TTL values.DNS PropagationEstimate how long a DNS change will take to fully propagate based on TTL and resolver caching.Port RangeCalculate the number of ports and validate ranges within TCP/UDP port allocations.Socket CalculatorCalculate maximum concurrent socket connections a server can support.QoS QueueCalculate queue depth and bandwidth allocation for QoS traffic classes.MPLS LabelCalculate MPLS label stack overhead and effective MTU for labeled traffic.SD-WAN CapacityCalculate aggregate SD-WAN throughput capacity across multiple underlay links.CDN CapacityEstimate CDN edge server capacity needed to serve peak content delivery traffic.Proxy CapacityEstimate the number of concurrent connections a proxy server can handle.
Network Storage
SAN CapacityCalculate usable storage area network capacity after RAID overhead and reserved space.NAS CapacityCalculate usable network-attached storage capacity across drives and RAID configuration.RAID CapacityCalculate usable capacity across RAID 0, 1, 5, 6 and 10 configurations.RAID PerformanceEstimate read/write performance for different RAID levels and drive counts.IOPS CalculatorCalculate storage IOPS from throughput, block size and access pattern.Disk ThroughputCalculate sequential disk throughput from IOPS and block size.Backup WindowCalculate how long a backup job will take given data size and transfer rate.Replication TimeCalculate the time required to replicate data across storage nodes or sites.Snapshot SizeEstimate storage snapshot size based on change rate and retention period.Storage GrowthProject future storage capacity needs based on current usage and growth rate.
Enterprise Networking
Switch Port CapacityCalculate switch port capacity requirements and oversubscription ratios.Core Network CapacityCalculate aggregate bandwidth requirements for a network core given distribution layer demand.Branch BandwidthCalculate required WAN bandwidth for a branch office based on users and application mix.WAN OptimizationEstimate effective WAN throughput gains from compression, caching and deduplication.MPLS CostEstimate MPLS circuit costs across sites based on bandwidth and location count.SDN CapacityCalculate flow table and controller capacity requirements for a software-defined network.VXLAN CalculatorCalculate VXLAN encapsulation overhead and VNI address space.GRE TunnelCalculate GRE tunnel encapsulation overhead and effective payload MTU.IPsec TunnelCalculate IPsec tunnel overhead and effective throughput for encrypted traffic.Network AvailabilityCalculate network uptime percentage and allowed downtime from SLA availability targets.
Telecom
Erlang BCalculate call blocking probability and required trunk lines using the Erlang B formula.Erlang CCalculate call center agent staffing and wait probability using the Erlang C formula.Busy Hour TrafficCalculate busy hour call traffic in Erlangs from call volume and duration.Call BlockingCalculate the probability of call blocking for a given number of trunks and traffic load.Call CapacityCalculate maximum simultaneous call capacity for a given trunk or bandwidth allocation.SMS CapacityCalculate SMS throughput capacity for a messaging gateway or SMPP connection.Voice Codec BandwidthCalculate bandwidth consumption per call for common VoIP codecs including overhead.SIP ChannelCalculate the number of concurrent SIP channels supported by available bandwidth.SS7 Link CapacityCalculate signaling capacity of an SS7 link based on link speed and message size.Diameter CapacityCalculate Diameter signaling transaction capacity for a given link and message rate.SIP Trunk Capacity CalculatorSize a SIP trunk from busy-hour call attempts and hold time: Erlangs, concurrent channels and the bandwidth they consume.RTP Bandwidth CalculatorCompute true on-the-wire RTP bandwidth per call including RTP, UDP, IP and layer-2 framing overhead.IMS Session CalculatorEstimate concurrent IMS sessions, SIP transaction rate and the number of CSCF nodes a subscriber base needs.GTP Tunnel CalculatorSize GTP-U transport for a bearer population, including encapsulation overhead and packet-per-second load.LTE Cell Capacity CalculatorEstimate LTE cell and site throughput from channel bandwidth, spectral efficiency and MIMO layers.5G NR Capacity CalculatorWork out 5G NR cell capacity from bandwidth, spectral efficiency, MIMO layers, control overhead and the TDD split.VoLTE Capacity CalculatorSize VoLTE load: Erlangs, concurrent QCI-1 bearers, busy-hour call attempts and the bearer bandwidth required.VoWiFi Capacity CalculatorFind how many VoWiFi calls an access point can carry from its PHY rate and airtime efficiency, and how many APs a site needs.PCRF Capacity CalculatorSize PCRF/PCF policy nodes from subscriber count, sessions per subscriber and Gx transaction rate with N+1 redundancy.Charging Session CalculatorEstimate online charging TPS, daily CDR volume and mediation storage for a subscriber base.Subscriber Capacity CalculatorWork out how many subscribers a cluster of core nodes supports, with redundancy reserved and headroom against today's load.eNodeB Capacity CalculatorSize an eNodeB: sector throughput, connected users, S1 transport requirement and RRC connection load.gNodeB Capacity CalculatorSize a 5G gNodeB across its cells: air-interface capacity, N3 midhaul transport and supported connected devices.Backhaul Bandwidth CalculatorDimension cell-site backhaul from peak cell rates, statistical multiplexing gain, growth and protection overhead.MEC Capacity CalculatorSize multi-access edge compute: offloaded traffic, edge server count and the round-trip latency saved versus the central core.Subscriber Growth Forecast CalculatorProject subscriber numbers with compound growth and churn, and see when the forecast crosses your platform's capacity.Call Setup Delay CalculatorAdd up signalling hops, processing time and radio setup to get post-dial delay and check it against the ITU target.Carrier-Grade NAT Capacity CalculatorWork out subscribers per public IPv4 address, total port-block demand and how many public addresses a CGNAT pool needs.ISP Bandwidth Oversubscription CalculatorCheck an access node's contention ratio: sold capacity versus uplink, busy-hour demand and the throughput each subscriber really gets.Telecom Network Health Score CalculatorScore a mobile network out of 100 from accessibility, retainability, call success rate, latency and congestion KPIs.
Data Center
Rack CapacityCalculate available rack unit space and equipment capacity for a server rack.Rack PowerCalculate total power draw and headroom for equipment installed in a server rack.Rack CoolingCalculate cooling capacity required to dissipate heat load from a server rack.Cable Length DCCalculate structured cabling length requirements between racks in a data center.UPS RuntimeCalculate how long a UPS battery will sustain a given load before depletion.PDU LoadCalculate power distribution unit load and remaining capacity across connected circuits.Power Usage EffectivenessCalculate PUE, the ratio of total facility power to IT equipment power, for a data center.CRAC CapacityCalculate required CRAC unit cooling capacity for a data center's total heat load.Generator RuntimeCalculate how long a backup generator will run on available fuel at a given load.Data Center EfficiencyCalculate overall data center energy efficiency combining power, cooling and IT load metrics.Leaf-Spine Capacity CalculatorSize a leaf-spine fabric: total fabric bandwidth, per-leaf uplink capacity and the resulting oversubscription.Oversubscription Ratio CalculatorCompare access bandwidth with uplink bandwidth to get the oversubscription ratio and the uplinks a target needs.East-West Traffic CalculatorEstimate server-to-server traffic inside a data centre and how much of it actually crosses the fabric.North-South Traffic CalculatorSize the data centre border from north-south traffic volume, growth allowance and uplink speed.Fabric Bandwidth CalculatorTotal spine capacity, bisection bandwidth and per-leaf share for a data centre fabric.Fabric Expansion CalculatorCheck whether new leaves fit the existing spines, and count the spine ports, cables and bandwidth they add.VXLAN VNI CalculatorWork out how much of the 16.7 million VNI space a multi-tenant VXLAN design consumes.EVPN Route CalculatorEstimate EVPN route-type counts and control-plane memory from VTEPs, MAC addresses, VNIs and prefixes.DC Gateway Capacity CalculatorCount the border gateways a data centre needs based on throughput, NAT session scale and redundancy.Network Fabric Latency CalculatorAdd switch, serialisation, cable propagation and queueing delay to get end-to-end fabric latency.Top-of-Rack Switch CalculatorCount top-of-rack switches for a row from server NIC ports, uplink reservations and dual-ToR redundancy.Rack Port Density CalculatorWork out how many switch ports fit in a rack, the density per rack unit and the free U remaining.Cable Count CalculatorCount fabric and access cables for a leaf-spine build, including a spares allowance.Fiber Pair CalculatorConvert link count and optic type into fibre strands, duplex pairs and MPO trunk cables required.Transceiver Compatibility CalculatorCheck a transceiver against link distance and optical loss budget to confirm the run will actually come up.40G to 100G Migration CalculatorPlan a 40G to 100G migration: ports needed, capacity gain and access ports gained through 4×25G breakout.100G to 400G Upgrade CalculatorConsolidate 100G ports into 400G: port count saved, capacity delivered and power per gigabit improvement.PFC Buffer CalculatorSize priority flow control headroom per port from link speed, cable length and pause response time.RoCE Network CalculatorSize a lossless RoCEv2 fabric for a GPU or storage cluster, including header efficiency and port count.Storage Network Throughput CalculatorConvert IOPS and block size into storage network throughput and the number of links required.SAN Fabric CalculatorSize a Fibre Channel SAN: host-to-storage fan-out, switch count and buffer credits for long distance.DCI Bandwidth CalculatorSize a data centre interconnect from daily change rate, replication window, RPO and distance latency.Network Redundancy CalculatorDerive component availability from MTBF and MTTR, then the availability an N+M redundant group delivers.Data Center Network Health Score CalculatorScore a data centre fabric out of 100 on utilisation, oversubscription, availability and drop rate.
Network Operations
IP Address Capacity PlannerPlan an IP allocation: addresses needed today and after growth, the CIDR prefix that fits and the waste it leaves.Network Growth Forecast CalculatorCompound current traffic by a growth rate to forecast future load and the year the link runs out of capacity.Fiber Utilization CalculatorMeasure how much of a fiber plant is lit: strands in use, wavelengths per pair, spare capacity and dark-fiber headroom.Redundancy Calculator (N+1, N+2)Size an N+1 or N+2 cluster: units required, spare capacity, per-unit load after a failure and the cost of redundancy.Network MTBF CalculatorCompute mean time between failures for a device or a serial chain of devices, with the failure rate and annual failure count.Network MTTR CalculatorBreak mean time to repair into detect, dispatch, travel, diagnose and fix phases, and see which phase dominates.SLA Availability CalculatorConvert MTBF and MTTR into availability, the nines it earns and the downtime allowed per year, month and week.Network SLO Compliance CalculatorCompare measured availability against an SLO and see the compliance margin plus how much downtime is left in the period.Network Error Budget CalculatorTurn an SLO into a concrete error budget in minutes and failed requests, and track the burn rate against it.Maintenance Window CalculatorPlan a change window: task time, rollback reserve, verification and whether it fits before the impact deadline.Network Upgrade Time CalculatorEstimate a fleet software upgrade: image transfer, reload time, per-device duration and total elapsed campaign time.Change Impact CalculatorScore a network change's risk from blast radius, rollback feasibility, testing and timing, then get a recommended approval path.Incident Severity CalculatorClassify a network incident from users affected, service degradation, duration and business criticality into a P1–P4 priority.Capacity Exhaustion CalculatorFind when a resource runs out from its current usage and growth rate, including the date the upgrade trigger fires.Power over Ethernet (PoE) Budget CalculatorCheck a switch's PoE budget against connected devices using 802.3af, at and bt class limits, with cable loss included.Switch Power Consumption CalculatorEstimate switch power draw, annual energy use, cooling load and electricity cost across a fleet.Network Carbon Emission CalculatorConvert network energy use into annual CO2e emissions, per-device intensity and the trees needed to offset it.Network Cost EstimatorBuild up a network project cost: hardware, licences, cabling, installation labour, contingency and cost per port.Network ROI CalculatorMeasure return on a network investment: net benefit, ROI percentage, payback period and annualised return.Network TCO CalculatorTotal cost of ownership over the equipment life: capex, support, power, staff and circuits, with annual and per-port cost.Network Readiness Assessment CalculatorScore whether a network is ready for a new service across bandwidth, latency, jitter, loss, QoS and redundancy.Network Compliance Score CalculatorScore network compliance from controls implemented, findings outstanding, config drift and audit currency.Network Risk Score CalculatorQuantify network risk from single points of failure, unsupported hardware, unpatched devices, monitoring gaps and change volume.Overall Network Health Score CalculatorRoll availability, performance, capacity, security and operations metrics into one weighted network health score.