SI decimal prefixes and IEC binary prefixes are different. A displayed “GB” may be interpreted differently by software, so check the unit label.
| Unit | Definition | Bytes |
|---|---|---|
| kB / KB | 10³ B | 1,000 B |
| MB | 10⁶ B | 1,000,000 B |
| GB | 10⁹ B | 1,000,000,000 B |
| TB | 10¹² B | 1,000,000,000,000 B |
| KiB | 2¹⁰ B | 1,024 B |
| MiB | 2²⁰ B | 1,048,576 B |
| GiB | 2³⁰ B | 1,073,741,824 B |
| TiB | 2⁴⁰ B | 1,099,511,627,776 B |
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Sources & update policy
Verified: 2026-08-31. This page prioritizes primary standards and official registries. Time-sensitive items should be rechecked against the linked source.