Transfer Efficiency Calculator
Your network link might say 1 Gbps while a file copy reports 90 MB/s. This calculator compares measured throughput with the theoretical maximum.
Transfer efficiency72%
Theoretical maximum125 MB/s
Difference35 MB/s
A lower percentage does not identify the cause by itself. Storage, protocols, latency, packet loss, Wi-Fi and server limits are possible factors.
Why 1 Gbps equals 125 MB/s
One byte contains eight bits, so a 1,000 Mbps connection has a theoretical file rate of 125 MB/s. Protocol and system overhead mean real transfers commonly remain below the ideal ceiling.
Use efficiency as a clue
The percentage is useful for comparison and troubleshooting, but it cannot diagnose the bottleneck by itself. Pair it with the bottleneck calculator to compare network and storage limits.
Find the bottleneck →