File size converter

Convert bits, bytes, decimal storage units and binary storage units.

Tool guide

How to use File size converter

Convert bits, bytes, decimal storage units and binary storage units.

  1. Enter the values and choose the operation or units. Read the supported limits beside the inputs; try the labelled sample to see an example.
  2. Plain decimal numbers only (dot decimal, no grouping or currency symbol). Calculations stay on your device. k/M/G/T are decimal (1000); Ki/Mi/Gi/Ti are binary (1024). Fractional bits/bytes are mathematical only.
  3. Choose Convert size. Review the result, then download the text result. Editing inputs invalidates old results.
  4. Calculations are local and unmetered. Inputs and results are not uploaded or saved to your account; leaving the page clears them. Downloaded files remain on your device.
Read the full guide

Common questions

What are the limits of File size converter?

Nonnegative size up to 10^15 of the selected unit. Plain decimal numbers only (dot decimal, no grouping or currency symbol). Calculations stay on your device. k/M/G/T are decimal (1000); Ki/Mi/Gi/Ti are binary (1024). Fractional bits/bytes are mathematical only.