EVERYDAY CLARITY
Bandwidth Delay Product Calculator
Estimate data in flight from link throughput and round-trip latency.
Your result
Bandwidth delay product
B
Bandwidth delay product
kB
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Throughput (Mbit/s) | Enter throughput in Mbit/s; use the same basis as the other measurements. |
| Round-trip time (ms) | Enter round-trip time in ms; use the same basis as the other measurements. |
Understanding your result
Read Bandwidth delay product (B), Bandwidth delay product (kB) in the units and model stated on this page. The formula bytes = rate * 1000000 * rtt / 1000 / 8 · kilobytes = bytes / 1000 defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
How large a receive window is needed to fill this network path?
Estimate data in flight from link throughput and round-trip latency.
Common uses
- How large a receive window is needed to fill this network path
How it works
bytes = rate * 1000000 * rtt / 1000 / 8; kilobytes = bytes / 1000
Worked example
Enter Throughput: 100 Mbit/s; Round-trip time: 50 ms. Results: Bandwidth delay product: 625000 B; Bandwidth delay product: 625 kB.