Megabytes to Gigabytes
Convert megabytes to gigabytes instantly. 1 MB = 0.001 GB. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert megabytes to gigabytes
To convert megabytes to gigabytes, divide by 1,000 (multiply by 0.001). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
GB = MB × 0.001
Megabytes to Gigabytes conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Megabytes | Gigabytes |
|---|---|
| 1 MB | 0.001 GB |
| 2 MB | 0.002 GB |
| 3 MB | 0.003 GB |
| 5 MB | 0.005 GB |
| 10 MB | 0.01 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 100 MB | 0.1 GB |
| 500 MB | 0.5 GB |
| 1,000 MB | 1 GB |
What is a megabyte?
A million bytes.
What is a gigabyte?
A billion bytes. Drive capacity is sold in these.
The formula
GB = MB × 0.001
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Megabytes to Gigabytes
- Type the number of megabytes you want to convert.
- Read the result in gigabytes straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked gigabytes to megabytes page.
Megabytes to Gigabytes — frequently asked questions
How many gigabytes are in a megabyte?
One megabyte equals 0.001 GB. GB = MB × 0.001
What is the formula to convert megabytes to gigabytes?
The formula is GB = MB × 0.001. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert gigabytes back to megabytes?
Divide instead of multiplying: one gigabyte is 1,000 MB. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this megabytes to gigabytes free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the megabytes to gigabytes.
- megabytes to gigabytes
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- how many gigabytes in a megabyte
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error