Transfer estimate
A 1 GB file is 8,000 megabits. At 50 Mbps and 100% usable speed, the estimated transfer takes 160 seconds, or 2 minutes 40 seconds.
BIG Seller toolboxFile download time calculator
Estimate how long a customer needs to download a file. Adjust the file size, connection speed and usable share of that speed to compare delivery scenarios.
Quick start
How to use it
- Enter the total file size and its decimal unit.
- Set the buyer’s connection speed in megabits per second.
- Choose the usable percentage to account for an imperfect connection.
Tool notes
Frequently asked questions
Download duration in seconds equals file megabytes × 8 divided by effective megabits per second. Use measured throughput at 100% efficiency, or use the advertised line speed with a lower usable share. Applying both adjustments would count the same loss twice.
Is Mbps the same as MB/s?
No. Mbps measures megabits per second. There are eight bits in a byte, so 80 Mbps corresponds to 10 MB/s before overhead.
Does this measure my internet speed?
No. It uses the speed you enter. It does not transfer a test file or make a network speed measurement.
Why might a real download take longer?
Wi-Fi conditions, server throughput, congestion and pauses can change the rate. This estimate does not include waiting time before the first byte arrives.
