File size converter
Converts storage and file sizes between all common units – and explains why a “1 TB drive” shows up as 931 GB on your computer.
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How it works
- Enter a value.
- Choose its unit.
- Click “Convert” – all units are shown in a table.
Notes and limitations
- KB, MB, GB are decimal units (1 MB = 1,000,000 bytes). KiB, MiB, GiB are binary units (1 MiB = 1,048,576 bytes).
- Windows shows binary values but labels them “KB/MB/GB”. macOS has used decimal values since 2009.
- Internet speeds are given in bits: 100 Mbit/s equals 12.5 MB per second.