Convert gigabytes to megabytes
Convert gigabytes to megabytes, with the formula and a quick reference table.
1 GB = 1,000 MB
MB: Decimal: 1 MB = 1,000,000 bytes
All digital storage units
| Unit | Value | Symbol |
|---|---|---|
| 8,000,000,000 | b | |
| 1,000,000,000 | B | |
| 8,000,000 | kb | |
| 1,000,000 | kB | |
| 976,562.5 | KiB | |
| 8,000 | Mb | |
| 1,000 | MB | |
| 953.67432 | MiB | |
| 8 | Gb | |
| 1 | GB | |
| 0.93132257 | GiB | |
| 0.001 | TB | |
| 0.0009094947 | TiB | |
| 0.000001 | PB | |
| 0.00000088817842 | PiB |
gigabytes to megabytes at a glance
| GB | MB |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
Other digital storage conversions
How it works
Every unit in this dimension is defined as a ratio to one base unit — the byte. Converting is therefore two multiplications: into the base unit, then out of it.
1 GB = 1,000 MB Why your 1 TB drive shows up as 931 GB
Drive manufacturers use decimal units: 1 TB = 1,000,000,000,000 bytes. Operating systems have historically reported binary units, where 1 TiB = 1,099,511,627,776 bytes — but label them "GB". The disk is the size advertised; the two are just counting differently.
Rounding
Results are rounded to 8 significant figures, adjustable with the slider above. Exact factors are used internally, so chaining conversions does not accumulate error.
Sources
Conversion factors follow NIST Special Publication 811 (Guide for the Use of the International System of Units) and the BIPM SI Brochure, 9th edition. Every factor is checked by an automated round-trip test on each build.