BANDWIDTH & THROUGHPUT

File Transfer Time Calculator | Bandwidth

05/ 06

Estimate file transfer time and effective bandwidth from file size, Mbps/Gbps link speed and transfer efficiency.

Calculator inputs

bit / byte

Calculation results

ESTIMATED TRANSFER TIME

14m 49s

Effective rate: 90 Mbps
Data rate: 11.25 MB/s
At 100% efficiency: 13m 20s
File size: 10,000,000,000 bytes

File size × 8 ÷ (link rate × efficiency)

This is an estimate. Actual time depends on latency, loss and storage performance.

HOW IT WORKS

Calculate transfer time from size and link speed

Link speed is generally measured in bits per second; file size is measured in bytes. Multiply bytes by eight, then divide by bits per second.

A 10 GB file over a 100 Mbps link takes an ideal 800 seconds. At 90% efficiency, the effective rate is 90 Mbps and the estimate is about 889 seconds.

GB means one billion bytes; GiB means 2^30 bytes. Efficiency is your estimate for overhead and competing traffic. This tool does not independently simulate RTT, loss or storage performance.

FAQ

Frequently asked questions

Is 100 Mbps equal to 100 MB/s?

No. Divide by eight: the theoretical rate is 12.5 MB/s, before accounting for transfer efficiency.

What efficiency should I enter?

The default 90% is an example assumption. For a better estimate, divide measured throughput by nominal link speed.

Does this run a speed test?

No. It estimates time from your input and does not generate test traffic or measure the connection.