MB to GB Converter
Convert megabytes to gigabytes — 1,000 MB to the GB in decimal units, which is how storage is sold. Results update as you type; exact factors shown.
One megabyte (10⁶) is 0.001 gigabyte (10⁹) — see the exact factor, not a rounded rule of thumb.
How the mb to gb converter works
Storage converts through the byte (8 bits). Drive makers and network speeds use decimal prefixes (1 GB = 10⁹ bytes); operating systems often report binary units (1 GiB = 2³⁰ = 1,073,741,824 bytes) — sometimes labelled "GB". The gap is 7.4% at the gigabyte and 10% at the terabyte.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common data conversions
| From | To | Units |
|---|---|---|
| 100 MB | 0.1 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 250 MB | 0.25 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 500 MB | 0.5 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 512 MB | 0.512 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 1,000 MB | 1 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 1,024 MB | 1.024 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 2,000 MB | 2 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 5,000 MB | 5 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 10,000 MB | 10 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 16,000 MB | 16 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 32,000 MB | 32 GB | megabyte (10⁶) to gigabyte (10⁹) |
| 64,000 MB | 64 GB | megabyte (10⁶) to gigabyte (10⁹) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in bytes |
|---|---|---|
| bit | bit | 0.125 byte |
| byte | B | 1 byte |
| kilobyte (10³) | kB | 1,000 byte |
| megabyte (10⁶) | MB | 1,000,000 byte |
| gigabyte (10⁹) | GB | 1,000,000,000 byte |
| terabyte (10¹²) | TB | 1,000,000,000,000 byte |
| kibibyte (2¹⁰) | KiB | 1,024 byte |
| mebibyte (2²⁰) | MiB | 1,048,576 byte |
| gibibyte (2³⁰) | GiB | 1,073,741,824 byte |
| tebibyte (2⁴⁰) | TiB | 1,099,511,627,776 byte |
FAQFrequently asked questions about data conversion
How many MB in a GB?
1,000 MB in decimal units, which is what drive makers and networks use. Operating systems often show binary units, where 1 GiB is 1,024 MiB.
Why does my 1 TB drive show 931 GB?
The drive is 1,000,000,000,000 bytes; the operating system divides by 1,024 three times and shows 931 GiB.
Which is right?
Both — they are different units. The SI prefixes are decimal, and IEC prefixes (KiB, MiB, GiB) are the binary ones.
How many photos fit in a GB?
Roughly 300 at 3 MB each, or about 60 raw files.
Is a megabit the same as a megabyte?
No — eight megabits to the megabyte, which is why a 100 Mbps line downloads at 12.5 MB/s.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.