TCP & Transport Calculators
16 free tcp & transport calculators in Networking.
- Bandwidth Delay Product CalculatorCompute the bandwidth-delay product: how many bytes are in flight on a link at any instant.
- Buffer Size CalculatorSize switch or router buffers using the BDP rule or the Stanford BDP over root-N rule for many flows.
- Congestion Window CalculatorModel the AIMD sawtooth: how far cwnd drops on loss and how many round trips recovery takes.
- Connection Capacity CalculatorFind how many TCP connections a host can hold and whether memory, ports or the table is the limit.
- Connection Timeout CalculatorDerive the RFC 6298 retransmission timeout and the total time TCP spends retrying before it gives up.
- 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.
- Packets Per Second CalculatorConvert a bit rate into packets per second for a given frame size, including preamble and interframe gap.
- Queue Depth CalculatorSize an interface queue for a target latency and check the M/M/1 wait time at your utilisation.
- Session Capacity CalculatorUse Little's law to turn a new-session rate and session lifetime into a firewall session table size.
- Socket Buffer CalculatorSize per-socket send and receive buffers from the BDP, and total the kernel memory a server needs.
- SYN Flood Capacity CalculatorSee how fast a SYN flood exhausts the backlog queue and whether SYN cookies are required.
- 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.
- TCP Window Size CalculatorSize the TCP receive window for a given bandwidth and RTT, and find the window scale factor it needs.
- Traffic Burst CalculatorSize a token bucket: the committed burst size a policer needs to pass a burst without dropping it.