Data Storage converter
Megabytes to Gigabytes
Converting Megabytes to Gigabytes is a single multiplication when you know the factor. One MB equals 0.001 GB, so multiply the value in MB by 0.001. The calculator below works in both directions and accepts decimals.
Formula 1 MB = 0.001 GB
Need the other direction? Gigabytes to Megabytes.
How to convert Megabytes to Gigabytes
A decimal megabyte is 10^6 bytes; a mebibyte is 2^20 bytes. A decimal gigabyte is 10^9 bytes; a gibibyte is 2^30 bytes.
To convert Megabytes to Gigabytes, multiply the value in MB by 0.001. For example, 10 MB × 0.001 = 0.01 GB. This works because the ratio between the two units is constant for every value in data storage.
Worked examples
| MB | GB |
|---|---|
| 1 MB | 0.001 GB |
| 2.5 MB | 0.0025 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
Reverse conversion
| GB | MB |
|---|---|
| 1 GB | 1,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 25 GB | 25,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
When this conversion is useful
This is the calculation you need when you are sizing a backup, a download or a storage plan and the units are mixed. Because the factor is fixed, you can use the same number for a single measurement or for a batch: 1,000 MB is 1 GB.
Is the conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Reference: BIPM SI Brochure and NIST SP 811. Last reviewed: 2026-11-01.
MB to GB conversion chart
The chart lists the most requested values. For a value that is not here, use the converter at the top of the page.
| Megabytes (MB) | Gigabytes (GB) |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 3 MB | 0.003 GB |
| 4 MB | 0.004 GB |
| 5 MB | 0.005 GB |
| 6 MB | 0.006 GB |
| 7 MB | 0.007 GB |
| 8 MB | 0.008 GB |
| 9 MB | 0.009 GB |
| 10 MB | 0.01 GB |
| 11 MB | 0.011 GB |
| 12 MB | 0.012 GB |
| 13 MB | 0.013 GB |
| 14 MB | 0.014 GB |
| 15 MB | 0.015 GB |
| 16 MB | 0.016 GB |
| 17 MB | 0.017 GB |
| 18 MB | 0.018 GB |
| 19 MB | 0.019 GB |
| 20 MB | 0.02 GB |
| 21 MB | 0.021 GB |
| 22 MB | 0.022 GB |
| 23 MB | 0.023 GB |
| 24 MB | 0.024 GB |
| 25 MB | 0.025 GB |
| 26 MB | 0.026 GB |
| 27 MB | 0.027 GB |
| 28 MB | 0.028 GB |
| 29 MB | 0.029 GB |
| 30 MB | 0.03 GB |
| 31 MB | 0.031 GB |
| 32 MB | 0.032 GB |
| 33 MB | 0.033 GB |
| 34 MB | 0.034 GB |
| 35 MB | 0.035 GB |
| 36 MB | 0.036 GB |
| 37 MB | 0.037 GB |
| 38 MB | 0.038 GB |
| 39 MB | 0.039 GB |
| 40 MB | 0.04 GB |
| 41 MB | 0.041 GB |
| 42 MB | 0.042 GB |
| 43 MB | 0.043 GB |
| 44 MB | 0.044 GB |
| 45 MB | 0.045 GB |
| 46 MB | 0.046 GB |
| 47 MB | 0.047 GB |
| 48 MB | 0.048 GB |
| 49 MB | 0.049 GB |
| 50 MB | 0.05 GB |
| 60 MB | 0.06 GB |
| 70 MB | 0.07 GB |
| 80 MB | 0.08 GB |
| 90 MB | 0.09 GB |
| 100 MB | 0.1 GB |
Frequently asked questions
How many Gigabytes are in 1 Megabytes?
1 MB equals 0.001 GB.
How do I convert Megabytes to Gigabytes?
Multiply the MB value by 0.001. Example: 25 MB = 0.025 GB.
What is 2.5 MB in GB?
2.5 MB = 0.0025 GB.
Is the MB to GB conversion exact?
It depends on the definition. This converter uses decimal units (1 kB = 1,000 bytes) and a bit-based base; binary units such as KiB and GiB are separate units in the list.
Does the calculator work offline?
Yes. The conversion runs in your browser with JavaScript, so it works after the page has loaded, even without a connection.