Gigabytes to Megabits
Convert gigabytes to megabits instantly — one gigabyte is 8000 megabits.
| Gigabytes | Megabits |
|---|---|
| 1 GB | 8000 Mb |
| 2 GB | 16000 Mb |
| 3 GB | 24000 Mb |
| 5 GB | 40000 Mb |
| 10 GB | 80000 Mb |
| 25 GB | 200000 Mb |
| 50 GB | 400000 Mb |
| 100 GB | 800000 Mb |
How to use
- Enter a value in the Gigabytes field.
- The Megabits figure appears immediately — no button to press.
- Typing in the Megabits field converts back to Gigabytes the same way.
- Use the reference table for the values that come up most often.
Gigabytes to Megabits formula
Converting gigabytes to megabits is a single multiplication by 8000.
Mb = GB × 8000
Put another way, one gigabyte is exactly 8,000 megabits.
Why this factor: the gigabyte and the megabit are both defined against the byte, so dividing one definition by the other gives 8000 directly. Both definitions are set out in full below.
To go the other way, divide by 8000 — or use the Megabits to Gigabytes converter, which is the same calculation reversed.
Worked example
Given 500 GB, multiplying by 8000 yields 4000000 Mb.
500 GB × 8000 = 4000000 Mb
The converter above does this for any value you type, in either direction.
What is a gigabyte?
A gigabyte is one billion bytes — the everyday unit of storage and memory capacity.
Definition: Exactly 1,000,000,000 bytes under SI prefixes. The binary gibibyte (GiB) is 1,073,741,824 bytes.
Where it is used: Phone and laptop storage, RAM capacity, video file sizes, and cloud storage plans.
What is a megabit?
A megabit is one million bits — the unit internet speeds are advertised in.
Definition: Exactly 1,000,000 bits, so exactly 125,000 bytes.
Where it is used: Broadband speed tiers and video streaming bitrates, quoted as Mb/s or Mbps.
Worth knowing: Divide advertised megabits per second by 8 to get the megabytes per second a download will actually show.
Gigabytes vs Megabits
The gigabyte and the megabit belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many megabits are in a gigabyte?
One gigabyte equals 8000 megabits.
What is the formula to convert gigabytes to megabits?
Multiply the number of gigabytes by 8000. To reverse it, divide by 8000 instead.
How do I convert megabits back to gigabytes?
Divide by 8000, which is the same as multiplying by 0.000125.
How many megabits are in 10 gigabytes?
10 GB works out to 80000 Mb.
Is there anything to watch out for with megabits?
Divide advertised megabits per second by 8 to get the megabytes per second a download will actually show.
How is the gigabyte defined?
Exactly 1,000,000,000 bytes under SI prefixes. The binary gibibyte (GiB) is 1,073,741,824 bytes.