Technology & Computing
TCP Window Size & Throughput Ceiling Calculator
Estimate the maximum achievable TCP throughput on a lossy path using the Mathis equation.
Your inputs
Change any value to update the result instantly.
Estimated throughput ceiling
7.3871 Mbps
Throughput in MB/s
0.9234 MB/s
Round-trip time
50 ms
Packet loss rate
0.1%
The Mathis equation shows why even tiny packet loss severely caps throughput on high-latency links — this is why data-center RTT and low loss matter so much.
Formula and working
Throughput (bps) ≈ (MSS × 8) ÷ (RTT × √p), where p is the packet loss probability
- 1
Collect the inputs
Maximum segment size (bytes) = 1,460; Round-trip time (ms) = 50; Packet loss rate (%) = 0.1
- 2
Apply the formula
Throughput (bps) ≈ (MSS × 8) ÷ (RTT × √p), where p is the packet loss probability
- 3
Result
Estimated throughput ceiling = 7.3871 Mbps
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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