This converter turns megabytes into gigabytes instantly, using the exact factor 1 megabyte = 0.001 gigabytes. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One million bytes; the unit for photos and documents. One billion bytes — how storage and mobile data are sold.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
megabytes- The amount you are converting, measured in megabytes
0.001- The exact number of gigabytes in one megabyte
gigabytes- The converted result
How it works, step by step
- Enter the number of megabytes you want to convert.
- The value is multiplied by 0.001, the exact conversion factor.
- The result is displayed in gigabytes, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 megabytes
Multiply 5 by 0.001. That gives 0.005 gigabytes. A quick sanity check: one megabyte is smaller than one gigabyte, so the number should get smaller — and it does.
Converting 72 megabytes
72 × 0.001 = 0.072 gigabytes. Working backwards, 0.072 ÷ 0.001 returns 72 megabytes, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many gigabytes are in one megabyte?
Exactly 0.001. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert megabytes to gigabytes?
Gigabytes = megabytes × 0.001. To reverse it, divide instead: megabytes = gigabytes ÷ 0.001, which is the same as multiplying by 1000.
Is the megabyte bigger than the gigabyte?
No. One megabyte is only 0.001 of a gigabyte, so the gigabyte is the larger unit.
Why does my answer differ slightly from other megabytes to gigabytes converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a megabyte?
One million bytes; the unit for photos and documents.
What is a gigabyte?
One billion bytes — how storage and mobile data are sold.
Megabytes to gigabytes reference table
| Megabytes | Gigabytes |
|---|---|
| 0.5 MB | 0.0005 GB |
| 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 |
| 15 MB | 0.015 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 50 MB | 0.05 GB |
| 75 MB | 0.075 GB |
| 100 MB | 0.1 GB |
| 250 MB | 0.25 GB |
| 500 MB | 0.5 GB |
| 1000 MB | 1 GB |
Exact factor: 1 megabyte = 0.001 gigabytes. Values rounded for display.