Download / Data Transfer Time Calculator

How long it takes to transfer a file at a given connection speed.

How to use the Download / Data Transfer Time Calculator

Enter or select: File size, Size unit, Speed, Speed unit, Efficiency (protocol overhead).
The results (Transfer time, Seconds) are calculated instantly as you type.
Use “Copy link” to share the calculation with the same input values.

Formula

t = size × 8 / (bit rate × efficiency)