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Download time calculator

Estimate transfer time from file size, connection speed and the usable share of that speed. MB and MiB are treated separately.

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01

Your inputs

The starting values are an example.

100% means the full stated connection speed is available for the transfer.

Decimals: 12.5 · Thousands: 1,234.56. Follow the field instructions for lists.

02

Your result

Enter your values and select Calculate.

Your calculation will appear here.

Your result will include the relevant values and units.

Understand the calculation

Formula and example

How it is calculated

Time = file size in bytes × 8 ÷ usable data rate in bits/s

Worked example

1 GB at 100 Mbit/s with 100% of the speed available takes 80 seconds in this model.

Things to check

  • One byte contains eight bits. A connection speed advertised in Mbit/s cannot be used directly with a file size in MB without conversion.
  • For a fluctuating connection, use the average throughput actually available.