Broadband Speed Calculator
Quick File Size Presets
File Size
Speed (Mbps)
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.
- 1Download Time (seconds) = File Size (Mb) ÷ Speed (Mbps)
- 21 Byte = 8 bits — always multiply file size in MB by 8 first
- 31 GB file = 8,192 Mb of data to transfer
- 4Convert total seconds to hours, minutes, and seconds for readability
4 GB movie on 100 Mbps connection=5 minutes 27 seconds
50 GB game on 1 Gbps connection=6 minutes 40 seconds
100 MB software update on 10 Mbps=1 minute 20 seconds
| File Size | 10 Mbps | 100 Mbps | 1 Gbps |
|---|---|---|---|
| 100 MB | 1m 20s | 8s | < 1s |
| 1 GB | 13m 20s | 1m 20s | 8s |
| 4 GB | 53m | 5m 20s | 32s |
| 25 GB | 5h 33m | 33m 20s | 3m 20s |
| 50 GB | 11h 6m | 1h 6m | 6m 40s |
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