129 · Productivity

File Size Converter

Enter a size and unit to convert it and see it in every other unit.

Result

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How to use the file size converter

  1. Enter a size.
  2. Choose the unit it’s in and the unit you want.
  3. Read the result and the full list.

Why your 1 TB drive shows 931 GB

Drive makers use decimal units: 1 TB = 1,000,000,000,000 bytes. Windows counts in binary units (1 GiB = 1,073,741,824 bytes) but labels them “GB”, so the same drive appears as about 931 “GB”. No space is missing; it’s two different units with similar names.

Examples

1.5 GB

1,430.51 MiB

1 TB

931.32 GiB

Questions

Is 1 KB 1,000 or 1,024 bytes?

Officially 1 KB is 1,000 bytes and 1 KiB is 1,024 bytes, but some software still uses KB for 1,024. Check which one your context uses.