Download Time Calculator
Enter a file size and your connection speed and get the transfer time. The calculator handles the trap that catches everyone: internet plans are sold in megaBITS per second, but file sizes are megaBYTES — a factor of eight apart.
Runs locally — nothing you enter is sent
Calculators
Free · no signup
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How to use
- Enter the file size and its unit (MB, GB, TB, MiB, GiB).
- Enter your connection speed and its unit — Mbps for a typical plan, MBps if you know the byte rate.
- Read the duration; the note shows what your plan actually moves in MB per second.
Examples
4.7 GB DVD at 50 Mbps
≈ 12 min 32 s
Supported formats
- Size units: MB, GB, TB, MiB, GiB. Speed units: Kbps, Mbps, Gbps (bits) and KBps, MBps (bytes).
Privacy
This tool runs entirely in your browser. Nothing you enter or open is sent anywhere. Privacy policy.
Limitations
- Results are the theoretical best case — real downloads add protocol overhead, server limits and Wi-Fi variance, so expect somewhat longer.
FAQ
Why is my 100 Mbps connection not downloading at 100 MB/s?
Mbps is megaBITS per second; a byte is 8 bits. 100 Mbps moves at most 12.5 MB each second — that's the plan working exactly as advertised.
How long does a 50 GB game take on 100 Mbps?
About 67 minutes in theory (50 GB = 400 gigabits ÷ 100 Mbps = 4,000 s). Enter your own numbers to get the exact figure.