How many megabits are in one gigabyte?

There are 8,000 megabits in 1 gigabyte.

How do you convert megabits to gigabytes?

Multiply the number of megabits by 0.000125 — or use the formula GB = Mb ÷ 8,000.

What is 32 megabits in gigabytes?

32 megabits is 0.004 gigabytes. 32 ÷ 8,000 = 0.004 gigabytes.

Is the megabits to gigabytes conversion exact?

Yes. The relationship is fixed by definition, so 0.000125 is an exact conversion factor — only the displayed result is rounded.

Megabits to Gigabytes Converter

Convert megabits to gigabytes instantly with this free megabits 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 megabit in gigabytes?

1 megabit is equal to exactly 0.000125 gigabytes.

1 ÷ 8,000 = 0.000125 gigabytes

Amount

Result0.000125

1 megabit = 0.000125 gigabytes

Megabits to Gigabytes formula

GB = Mb ÷ 8,000

The megabits to gigabytes conversion factor is 0.000125, which is exact by definition. 1 megabit = 0.000125 gigabytes, and 1 gigabyte = 8,000 megabits.

Worked examples

2 megabits = 0.00025 gigabytes — 2 ÷ 8,000 = 0.00025 gigabytes
32 megabits = 0.004 gigabytes — 32 ÷ 8,000 = 0.004 gigabytes
256 megabits = 0.032 gigabytes — 256 ÷ 8,000 = 0.032 gigabytes

Megabits to Gigabytes conversion table

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

megabits to gigabytes conversion table
Megabits (Mb)	Gigabytes (GB)
1 Mb	0.000125 GB
2 Mb	0.00025 GB
4 Mb	0.0005 GB
8 Mb	0.001 GB
16 Mb	0.002 GB
32 Mb	0.004 GB
64 Mb	0.008 GB
100 Mb	0.0125 GB
128 Mb	0.016 GB
256 Mb	0.032 GB
512 Mb	0.064 GB
1,000 Mb	0.125 GB
1,024 Mb	0.128 GB
2,048 Mb	0.256 GB

When you need to convert megabits 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.

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 megabit = 0.000125 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

Megabit (Mb): 1,000,000 bits — internet speeds are quoted in megabits per second. 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 megabit in gigabytes?: 1 megabit is equal to 0.000125 gigabytes.
How many megabits are in one gigabyte?: There are 8,000 megabits in 1 gigabyte.
How do you convert megabits to gigabytes?: Multiply the number of megabits by 0.000125 — or use the formula GB = Mb ÷ 8,000.
What is 32 megabits in gigabytes?: 32 megabits is 0.004 gigabytes. 32 ÷ 8,000 = 0.004 gigabytes.
Is the megabits to gigabytes conversion exact?: Yes. The relationship is fixed by definition, so 0.000125 is an exact conversion factor — only the displayed result is rounded.