Convert between Bytes, KB, MB, GB, TB, and PB. Supports binary (1024) and decimal (1000) systems.
| Unit | Binary (1024) | Decimal (1000) | Common Use |
|---|---|---|---|
| KB | 1,024 B | 1,000 B | Text file, small image |
| MB | 1,048,576 B | 1,000,000 B | Photo, MP3 song |
| GB | 1,073,741,824 B | 1,000,000,000 B | HD movie, game |
| TB | 1,099,511,627,776 B | 1,000,000,000,000 B | Hard drive, SSD |
| PB | 1,125,899,906,842,624 B | 1,000,000,000,000,000 B | Data center storage |
In binary (IEC): 1 GiB = 1024 MiB. In decimal (SI): 1 GB = 1000 MB. This tool supports both systems.
MB uses 1000² = 1,000,000 bytes. MiB uses 1024² = 1,048,576 bytes. Computers and RAM typically use binary units.
In binary: 1 TiB = 1,099,511,627,776 bytes. In decimal: 1 TB = 1,000,000,000,000 bytes.
Manufacturers use decimal (1000-based) units, while Windows uses binary (1024-based). A 1 TB drive shows ~931 GB in Windows.
Divide by 1024 (binary) or 1000 (decimal). For example, 1024 KB = 1 MB (binary) or 1.024 MB (decimal).
A petabyte (PB) is 10¹⁵ bytes (decimal) or 2⁵⁰ bytes (binary). It equals roughly 1 million GB or 500 billion pages of text.
Approximately: 500 photos, 250 songs, or 1 hour of HD video. Actual sizes vary by quality and compression.
Yes, completely free with no signup required. All calculations run in your browser.