Download Time Calculator
How long a file takes to download at a given connection speed.
Enter values
Mbps
—
—
Step by step
The formula
time = (size in megabits) / (speed in Mbps)
The catch is units. Connection speeds are quoted in megabits per second, file sizes in megabytes — and a byte is eight bits. That factor of eight is why a "100 Mbps" line moves at best about 12.5 MB per second, before protocol overhead takes its share.
All calculations run locally in your browser and update instantly as you type.
Example calculations
Common questions this calculator answers — select one to load its values.
Related calculators
Frequently asked questions
Why divide the speed by 8?+
Connection speeds are quoted in megaBITS per second, but file sizes are in megaBYTES. One byte is 8 bits, so a 100 Mbps line moves about 12.5 MB per second at best.
All calculations run locally in your browser. Nothing you type is sent to a server.