Byte Converter
Convert between bytes, KB, MB, GB, TB and their binary (KiB, MiB, GiB) equivalents. Enter a value in any unit and all others update instantly. Covers both decimal (SI) and binary (IEC) prefixes so you always know the exact difference between a megabyte and a mebibyte.
| Unit | Abbreviation | System | Value | Copy |
|---|---|---|---|---|
| Byte | B | SI | 1000000 | |
| Kilobyte | KB | SI | 1000 | |
| Megabyte | MB | SI | 1 | |
| Gigabyte | GB | SI | 0.001 | |
| Terabyte | TB | SI | 1.000000e-6 | |
| Petabyte | PB | SI | 1.000000e-9 | |
| Kibibyte | KiB | IEC | 976.5625 | |
| Mebibyte | MiB | IEC | 0.9536743164 | |
| Gibibyte | GiB | IEC | 0.0009313225746 | |
| Tebibyte | TiB | IEC | 9.094947e-7 | |
| Pebibyte | PiB | IEC | 8.881784e-10 |
SI: 1 KB = 1,000 B • IEC: 1 KiB = 1,024 B
Bits, Bytes & Prefixes
- 1 KiB = 1,024 bytes (binary, used by OS and RAM); 1 KB = 1,000 bytes (SI, used by storage manufacturers).
- Hard drive manufacturers use SI (decimal) — that's why a "1 TB" drive shows as ~931 GiB in Windows or macOS.
- Network speeds are measured in bits per second (Mbps) — divide by 8 to convert to bytes per second (MB/s).
- Memorise: 1 byte = 8 bits, 1 KB ≈ 1,000 bytes, 1 MB ≈ 1,000,000 bytes, 1 GB ≈ 1,000,000,000 bytes.
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