TCP Window Size
Calculate TCP Window Size instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
TCP Window Size
BandwidthMbps
RTTms
TCP Window
6,250KB
More about: TCP Window Size
What it calculates
The “TCP Window Size” calculator computes TCP Window in KB from 2 parameters: bandwidth (Mbps), rtt (ms).
Standard IT calculations for developers and sysadmins.
Example calculation
With parameters Bandwidth = 1,000 Mbps, RTT = 50 ms the result is 6,250 KB.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.