Data Size Converter
Convert KB, MB, GB, and KiB, MiB, GiB.
Enter a value to convert instantly between data sizes. Decimal units (KB, MB, GB, TB) use powers of 1000, while binary units (KiB, MiB, GiB, TiB) use powers of 1024. Everything runs locally in your browser.
Decimal units (KB, MB, GB, TB) use 1000; binary units (KiB, MiB, GiB, TiB) use 1024.
Your input is processed locally in your browser — nothing is uploaded, stored or logged.
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How it works
- 1 Type a value.
- 2 Pick the units to convert from and to.
- 3 Copy the result, or Swap to reverse.
Common use cases
- Convert file sizes.
- Compare KB and KiB.
- Estimate storage or bandwidth.
- Check download sizes.
Frequently asked questions
Is my input sent to a server?
No. Every calculation runs locally in your browser — your input is never uploaded, stored or logged.
What's the difference between KB and KiB?
1 KB (kilobyte) = 1000 bytes (decimal). 1 KiB (kibibyte) = 1024 bytes (binary). Operating systems often label binary sizes with decimal symbols, causing confusion.
How many bits in a byte?
8 bits = 1 byte.
Is it really free?
Yes — free, with no signup and no limits.