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Convert file sizes between units

Enter a size to see it in decimal units (KB, MB, GB) and binary units (KiB, MiB, GiB) at once.

B
1,000,000,000
KB
1,000,000
MB
1,000
GB
1
TB
0.001
KiB
976,562.5
MiB
953.674316
GiB
0.931323
TiB
0.000909

KB, MB, GB and TB are decimal (1 KB = 1,000 bytes). KiB, MiB, GiB and TiB are binary (1 KiB = 1,024 bytes).

Calculations run in your browser. Nothing you enter is sent to ToolsNest servers or stored.

How to use the File Size Converter

  1. 1Enter a number.
  2. 2Choose its unit.
  3. 3Read every other unit.

Supported formats and limits

  • Decimal: 1 KB = 1,000 bytes.
  • Binary: 1 KiB = 1,024 bytes.

Common uses

  • Understanding why a 1 TB drive shows 931 GB.
  • Checking upload limits.
  • Estimating storage.

Frequently asked questions

Why does my computer show less space?

Drives are sold in decimal units but some systems report binary units with decimal labels.

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