Broadband Speed Calculator

A broadband speed calculator converts internet connection speed (Mbps) into real download time for any file size. It clarifies the bits vs bytes distinction that causes widespread confusion with ISP speed claims

The calculator uses the standard published formula for broadband speed. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Download Time (seconds) = File Size (Mb) ÷ Speed (Mbps). Each step in the calculation is shown so you can verify the result manually.