Data Size Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly.
Type in any field and the others update automatically.
Type in any field — the others update instantly. Uses decimal (SI) prefixes (1 KB = 1,000 bytes).
Data Size Conversion uses bytes as the base unit. This converter uses decimal (SI) prefixes where each step is 1,000×.
Key relationships:
1 KB = 1,000 bytes1 MB = 1,000 KB = 1,000,000 bytes1 GB = 1,000 MB = 1,000,000,000 bytes1 TB = 1,000 GB = 1,000,000,000,000 bytes1 PB = 1,000 TB = 1,000,000,000,000,000 bytes
Decimal vs. Binary: Storage manufacturers use decimal (1 KB = 1,000 bytes), while operating systems often use binary (1 KiB = 1,024 bytes). This is why a “500 GB” drive shows as ~465 GB in your OS.
Common references:
- A text email: ~5 KB
- An MP3 song: ~5 MB
- A full-length movie (HD): ~4 GB
- A modern video game: ~50–100 GB