Networking Calculators

20 free networking calculators in Linux.

ARP Cache CalculatorCalculate ARP cache size and expiration behavior based on neighbor table thresholds.
Bandwidth Utilization CalculatorCalculate network bandwidth utilization percentage against interface link capacity.
Bonding Capacity CalculatorCalculate aggregate bandwidth capacity of a bonded network interface across multiple NICs.
Bridge Interface CalculatorCalculate throughput and MAC table capacity for a Linux bridge interface.
Connection Tracking CalculatorCalculate conntrack table size needed for a firewall or NAT gateway's connection load.
DNS Cache Size CalculatorCalculate DNS resolver cache size needed to serve a given query rate and TTL distribution.
Hostname Resolution TimeEstimate hostname resolution latency across DNS, /etc/hosts and cache lookup layers.
Interface Queue CalculatorCalculate network interface queue length needed to avoid packet drops under burst load.
MSS CalculatorCalculate maximum segment size from MTU by subtracting TCP/IP header overhead.
MTU CalculatorCalculate maximum transmission unit and payload size after protocol header overhead.
Network Buffer Size CalculatorCalculate optimal socket send/receive buffer sizes based on bandwidth and latency.
NIC Throughput CalculatorCalculate achievable throughput of a network interface card given link speed and overhead.
Packet Rate CalculatorCalculate packets-per-second rate and its CPU load impact on network interrupt handling.
Routing Table Size CalculatorCalculate routing table memory footprint from route count and kernel FIB entry size.
Socket Buffer CalculatorCalculate total kernel memory consumed by socket send and receive buffers system-wide.
Socket Count CalculatorCalculate maximum concurrent socket connections supportable by system file descriptor limits.
TCP Connection CalculatorCalculate maximum concurrent TCP connections a server can handle given port and memory limits.
TCP Window Size CalculatorCalculate optimal TCP window size from bandwidth-delay product for maximum throughput.
UDP Port CalculatorCalculate available UDP port range and usable ports after reserved and ephemeral ranges.
VLAN Interface CalculatorCalculate available VLAN IDs and subinterface count for 802.1Q tagged networking.