Gigabytes to Megabytes Converter
1 gigabyte = 1,000 megabytes.
Enter a value
Result
1 gigabyte =
1,000 MB
1 GB × 1,000 = 1,000 MB
Decimal units count in 1,000s; binary units (KiB, MiB, GiB) count in 1,024s
The working
- 1. Convert 1 GB to bytes: 1 × 1,000,000,000 = 1,000,000,000.
- 2. Convert to MB: 1,000,000,000 ÷ 1,000,000 = 1,000.
1 GB in every unit
Why a drive shows less than advertised
- A 500 GB drive shows as
- ≈ 465.7 GiB
- MP3 song
- ≈ 4 MB
- Phone photo
- ≈ 3 MB
- HD film
- ≈ 4 GB
Conversion table
Gigabytes to Megabytes
| Gigabytes | Megabytes |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 3 | 3,000 |
| 4 | 4,000 |
| 5 | 5,000 |
| 6 | 6,000 |
| 7 | 7,000 |
| 8 | 8,000 |
| 9 | 9,000 |
| 10 | 10,000 |
| 15 | 15,000 |
| 20 | 20,000 |
| 25 | 25,000 |
| 50 | 50,000 |
| 100 | 100,000 |
Megabytes to Gigabytes
| Megabytes | Gigabytes |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 3 | 0.003 |
| 4 | 0.004 |
| 5 | 0.005 |
| 6 | 0.006 |
| 7 | 0.007 |
| 8 | 0.008 |
| 9 | 0.009 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
Formula and worked example
megabytes = gigabytes × 1,000.
Convert 2 gigabytes to megabytes: 2 × 1,000 = 2,000 MB.
When you need this
Useful for working out how many files or how much video fits on a drive, or how far a data allowance will stretch.
Questions people ask
How many megabytes are in a gigabyte?
One gigabyte is 1,000 megabytes.
How do I convert gigabytes to megabytes?
Multiply the number of gigabytes by 1,000.
What is 10 GB in MB?
10 gigabytes is 10,000 megabytes.
How do I convert megabytes back to gigabytes?
Multiply by 0.001: one megabyte is 0.001 gigabytes.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators