Bandwidth-Delay Product Calculator
Works out how much data fits in the pipe at once.
Bandwidth-delay product
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
In binary units (powers of 1,024) —
In bits —
TCP window scale needed —
Rate with an unscaled window — Mbit/s
Reading this —
The formula
BDP = bandwidth × round-trip time
Use the bottleneck bandwidth of the path.
What to watch out for
Paths with a large product are often called long fat networks, and TCP needs tuning to use them fully.
Frequently Asked Questions
What is the BDP of 1 Gbit/s at 50 ms?
6.25 MB, which needs window scale 7.
What is the largest unscaled TCP window?
65,535 bytes, because the field is 16 bits.