57 · Calculators

Download Time Calculator

Enter a file size and your connection speed to see how long the download will take.

Download time

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How to use the download time calculator

  1. Enter the file size and unit.
  2. Enter your connection speed and unit.
  3. Read the time at full and at 80% speed.

Bits vs. bytes

Internet speeds are usually in megabits per second (Mbps), file sizes in megabytes (MB). There are 8 bits in a byte, so a 100 Mbps line moves about 12.5 MB a second. Real downloads rarely hit full speed, so the 80% figure is more realistic.

Examples

50 GB game at 100 Mbps

1:06:40

4 GB film at 1 Gbps

0:00:32

Questions

Why is my download slower?

Wi-Fi, other devices, and the server’s own speed all limit it. The calculator shows the best case.

Does it use 1,000 or 1,024?

Decimal units (1 GB = 1,000,000,000 bytes), as used by internet providers and most stores.