Bandwidth calculator

Transfer time with protocol overhead, and the bandwidth-delay product that caps TCP throughput.

Input

Transfer size
Link rate
Protocol overhead (%)~5% is typical for bulk TCP over Ethernet.
Round-trip time (ms)Used for the bandwidth-delay product.
Transfer time14m 2sWith overhead
Theoretical800.0sNo overhead
Effective rate950 Mbps

Bandwidth-delay product

Data in flight on the link. A TCP window smaller than this caps throughput no matter how much bandwidth there is.

In flight
4882.8 KB
Bytes
5,000,000

Exceeds the 64 KB TCP window limit — window scaling (RFC 7323) is required to fill this link.