Estimate ideal and real-world download time from file size, connection speed, and network overhead. Decimal MB, GB, and TB units are used consistently.
Ideal line-rate time: 1m 20s. Adjusted time accounts for the overhead setting.
| File | 10 Mbps | 50 Mbps | 100 Mbps | 500 Mbps | 1 Gbps |
|---|---|---|---|---|---|
| 100 MB | 1m 20s | 16s | 8s | 2s | 1s |
| 1 GB | 13m 20s | 2m 40s | 1m 20s | 16s | 8s |
| 5 GB | 1h 6m 40s | 13m 20s | 6m 40s | 1m 20s | 40s |
| 10 GB | 2h 13m 20s | 26m 40s | 13m 20s | 2m 40s | 1m 20s |
| 50 GB | 11h 6m 40s | 2h 13m 20s | 1h 6m 40s | 13m 20s | 6m 40s |
| 100 GB | 22h 13m 20s | 4h 26m 40s | 2h 13m 20s | 26m 40s | 13m 20s |
Time = file size in bits ÷ effective speed in bits per second. Eight bits equal one byte. This calculator uses decimal SI units: 1 MB is 1,000,000 bytes and 1 GB is 1,000 MB.
Protocol overhead, Wi-Fi quality, server limits, congestion, and other devices can reduce throughput. The overhead input makes that difference explicit rather than presenting an ideal result as guaranteed.
Unit convention reviewed July 2026 against the NIST International System of Units reference.