How many megabytes are in one gigabyte?

There are 1,000 megabytes in 1 gigabyte.

How do you convert megabytes to gigabytes?

Multiply the number of megabytes by 0.001 — or use the formula GB = MB ÷ 1,000.

What is 32 megabytes in gigabytes?

32 megabytes is 0.032 gigabytes. 32 ÷ 1,000 = 0.032 gigabytes.

Is the megabytes to gigabytes conversion exact?

Yes. The relationship is fixed by definition, so 0.001 is an exact conversion factor — only the displayed result is rounded.

Megabytes to Gigabytes Converter

Convert megabytes to gigabytes instantly with this free megabytes to gigabytes converter. Enter any value to get an accurate data storage conversion, plus the formula, the conversion factor and a full reference table.

What is 1 megabyte in gigabytes?

1 megabyte is equal to exactly 0.001 gigabytes.

1 ÷ 1,000 = 0.001 gigabytes

Amount

Result0.001

1 megabyte = 0.001 gigabytes

Megabytes to Gigabytes formula

GB = MB ÷ 1,000

The megabytes to gigabytes conversion factor is 0.001, which is exact by definition. 1 megabyte = 0.001 gigabytes, and 1 gigabyte = 1,000 megabytes.

Worked examples

2 megabytes = 0.002 gigabytes — 2 ÷ 1,000 = 0.002 gigabytes
32 megabytes = 0.032 gigabytes — 32 ÷ 1,000 = 0.032 gigabytes
256 megabytes = 0.256 gigabytes — 256 ÷ 1,000 = 0.256 gigabytes

Megabytes to Gigabytes conversion table

Every value below is calculated with the exact conversion factor and rounded for display.

megabytes to gigabytes conversion table
Megabytes (MB)	Gigabytes (GB)
1 MB	0.001 GB
2 MB	0.002 GB
4 MB	0.004 GB
8 MB	0.008 GB
16 MB	0.016 GB
32 MB	0.032 GB
64 MB	0.064 GB
100 MB	0.1 GB
128 MB	0.128 GB
256 MB	0.256 GB
512 MB	0.512 GB
1,000 MB	1 GB
1,024 MB	1.024 GB
2,048 MB	2.048 GB

When you need to convert megabytes to gigabytes

Checking whether a file fits inside a storage or upload limit.
Working out how much of a mobile data allowance a download will use.
Reconciling the capacity printed on a drive with the smaller figure the operating system reports.

Getting a feel for the scale

A converted number is easier to trust when you can picture it. These reference points let you sanity-check the result at a glance.

Megabyte (MB)

A high-quality photo is 3–8 MB
A minute of MP3 audio is about 1 MB

Gigabyte (GB)

An hour of HD streaming uses about 3 GB
A modern phone photo library is tens of GB

Common mistakes to avoid

Dividing when you should multiply. Because 1 megabyte = 0.001 gigabytes, the answer should be smaller than the number you started with.
Treating 1 kB as 1,024 bytes. Storage and network figures use decimal units of 1,000; operating systems usually report binary units of 1,024, which is why a 1 TB drive shows as about 931 GiB.
Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.

How precise does the answer need to be?

Round to two decimals for human-readable sizes. When you are checking a hard limit, use the exact figure: a file 0.4% over an upload cap still fails.

How these units are defined

Megabyte (MB): 1,000,000 bytes in decimal (SI) notation. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.
Gigabyte (GB): 1,000,000,000 bytes in decimal (SI) notation. This unit's relationship to the SI base unit is exact by definition, so no rounding enters the conversion factor.

Frequently asked questions

What is 1 megabyte in gigabytes?: 1 megabyte is equal to 0.001 gigabytes.
How many megabytes are in one gigabyte?: There are 1,000 megabytes in 1 gigabyte.
How do you convert megabytes to gigabytes?: Multiply the number of megabytes by 0.001 — or use the formula GB = MB ÷ 1,000.
What is 32 megabytes in gigabytes?: 32 megabytes is 0.032 gigabytes. 32 ÷ 1,000 = 0.032 gigabytes.
Is the megabytes to gigabytes conversion exact?: Yes. The relationship is fixed by definition, so 0.001 is an exact conversion factor — only the displayed result is rounded.