Latency to Throughput
Free Latency to Throughput calculator with clear step-by-step results.
About Latency to Throughput
TCP throughput is capped by the window size divided by latency.
Formula
Formula
Throughput ≈ window ÷ RTT
Worked example
With the default values below, Latency to Throughput returns Max Throughput of 20.97. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Round-trip latency (ms)minimum 0.1
- 50
- Window size (bytes)minimum 1
- 131,072
Results
- Max Throughput
- 20.97 Mbps
- RTT (s)
- 0.050
- Bottleneck Note
- Limited by latency × window
Step by step
- 1Values used
- 2Formula
- 3Max Throughput= 20.97 Mbps
- 4RTT (s)= 0.050
- 5Bottleneck Note= Limited by latency × window
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How does this calculator work?
TCP throughput is capped by the window size divided by latency.
Why does this matter?
Long fat networks need big windows.