MB to GB Converter
Convert megabytes to gigabytes instantly. One megabyte equals exactly 0.001 gigabytes. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert megabytes to gigabytes
Worked example: convert 512 megabytes to gigabytes. Using gigabytes ← megabytes ÷ 1,000, we get 512 × 0.001 = 0.512 GB. To check the result, convert back: 0.512 GB ÷ 0.001 = 512 MB.
Megabytes to gigabytes chart
| 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 |
| 8 MB | 0.008 GB |
| 10 MB | 0.01 GB |
| 12 MB | 0.012 GB |
| 15 MB | 0.015 GB |
| 20 MB | 0.02 GB |
| 25 MB | 0.025 GB |
| 30 MB | 0.03 GB |
| 40 MB | 0.04 GB |
| 50 MB | 0.05 GB |
| 75 MB | 0.075 GB |
| 100 MB | 0.1 GB |
| 150 MB | 0.15 GB |
| 200 MB | 0.2 GB |
| 250 MB | 0.25 GB |
| 500 MB | 0.5 GB |
| 1,000 MB | 1 GB |
Gigabytes to megabytes (reverse)
| Gigabytes (GB) | Megabytes (MB) |
|---|---|
| 1 GB | 1,000 MB |
| 2 GB | 2,000 MB |
| 5 GB | 5,000 MB |
| 10 GB | 10,000 MB |
| 20 GB | 20,000 MB |
| 50 GB | 50,000 MB |
| 100 GB | 100,000 MB |
| 250 GB | 250,000 MB |
| 500 GB | 500,000 MB |
| 1,000 GB | 1,000,000 MB |
About the megabyte and the gigabyte
A megabyte is 1,000,000 bytes in decimal. A typical smartphone photo is a few megabytes and an MP3 song around 3 to 5 MB. In binary terms 1 MiB is 1,048,576 bytes.
A gigabyte is 1,000 megabytes in decimal; one GiB (gibibyte) is 1,073,741,824 bytes. Phone storage, RAM and mobile data plans are sold in GB.
One gigabyte equals 1,000 megabytes, which makes the gigabyte the larger unit of the two.
Everyday sizes in megabytes and gigabytes
| Everyday example (approximate) | In megabytes | In gigabytes |
|---|---|---|
| A web page | 2 MB | 0.002 GB |
| A phone photo | 3 MB | 0.003 GB |
| A 3-minute MP3 song | 5 MB | 0.005 GB |
| A 2-hour HD movie | 3,000 MB | 3 GB |
| A Blu-ray disc | 25,000 MB | 25 GB |
| A big video game | 100,000 MB | 100 GB |
Megabytes to gigabytes FAQ
How many gigabytes are in one megabyte?
One megabyte equals exactly 0.001 gigabytes. In the other direction, one gigabyte equals 1,000 megabytes.
How do I convert megabytes to gigabytes without a calculator?
convert 512 megabytes to gigabytes. Using gigabytes ← megabytes ÷ 1,000, we get 512 × 0.001 = 0.512 GB. To check the result, convert back: 0.512 GB ÷ 0.001 = 512 MB. For a quick estimate, round the factor to 0.001. Then 512 MB is about 0.512 GB, compared with the exact 0.512 GB (an error of 0%). That is close enough for planning, but use the calculator above when the number matters.
What is a web page in gigabytes?
A web page is about 2 megabytes, which is 0.002 gigabytes. Treat that as an approximate everyday figure rather than an official measurement.
Are the megabytes and gigabytes the same in every country?
Decimal MB = 1,000,000 bytes; binary MiB = 1,048,576 bytes. Decimal GB = 10^9 bytes; binary GiB = 1,073,741,824 bytes, which is why a "500 GB" drive shows about 465 GB in Windows.