💾 Data Size & Storage Converter

Using Data Size & Storage Converter

Work out why a "500 GB" drive shows about 465 in your computer, or convert a file size between bytes, megabytes, mebibytes and bits for a quota or upload limit.

How to use it

1. Type the number into Input Size.
2. Choose the source unit. KB, MB, GB and TB step by 1,000; KiB, MiB, GiB and TiB step by 1,024.
3. Choose the target unit and read Converted Size.
4. Scan the Equivalent Units Matrix to see the same quantity in every unit at once.

Worked example

Input and settings

500 GB to GiB

Expected result

465.661287308 GiB, which is why a 500 GB drive appears as about 465 GB in Windows.

Limits and common mistakes

• Windows labels binary sizes with decimal names (it says GB where it means GiB); macOS uses true decimal GB.
• Network speeds are usually in bits per second: 100 Mbps moves about 12.5 megabytes per second at best.
• A formatted drive has less usable space than its raw capacity, because the filesystem uses some of it.
• The matrix shows up to six decimal places, which hides very small values in the largest units.

Found a mismatch? Report a problem with a non-sensitive example. Read our privacy information before sharing inputs or links.