Megabits to Terabytes
An instant megabits-to-terabytes converter, with the formula and a reference table below.
| Megabits | Terabytes |
|---|---|
| 1 Mb | 1.25e-07 TB |
| 2 Mb | 2.5e-07 TB |
| 3 Mb | 3.75e-07 TB |
| 5 Mb | 6.25e-07 TB |
| 10 Mb | 1.25e-06 TB |
| 25 Mb | 3.125e-06 TB |
| 50 Mb | 6.25e-06 TB |
| 100 Mb | 1.25e-05 TB |
How to use
- Enter a value in the Megabits field.
- The Terabytes figure appears immediately — no button to press.
- Typing in the Terabytes field converts back to Megabits the same way.
- Use the reference table for the values that come up most often.
Megabits to Terabytes formula
The factor from megabits to terabytes is 1.25e-07.
TB = Mb × 1.25e-07
Why this factor: the megabit and the terabyte are both defined against the byte, so dividing one definition by the other gives 1.25e-07 directly. Both definitions are set out in full below.
To go the other way, divide by 1.25e-07 — or use the Terabytes to Megabits converter, which is the same calculation reversed.
Worked example
Given 64 Mb, multiplying by 1.25e-07 yields 8e-06 TB.
64 Mb × 1.25e-07 = 8e-06 TB
The converter above does this for any value you type, in either direction.
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.
What is a terabyte?
A terabyte is one trillion bytes, the standard capacity unit for hard drives and large archives.
Definition: Exactly 1×10¹² bytes under SI prefixes. The binary tebibyte (TiB) is about 1.1×10¹² bytes.
Where it is used: Hard drive and SSD capacity, backup archives, and database sizes.
Worth knowing: A 1 TB drive reports as roughly 931 GiB in an operating system that counts in powers of two — the storage is not missing, just labelled differently.
Megabits vs Terabytes
The megabit and the terabyte 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 terabytes are in a megabit?
One megabit equals 1.25e-07 terabytes.
What is the formula to convert megabits to terabytes?
Multiply the number of megabits by 1.25e-07. To reverse it, divide by 1.25e-07 instead.
How do I convert terabytes back to megabits?
Divide by 1.25e-07, which is the same as multiplying by 8000000.
How many terabytes are in 10 megabits?
10 Mb works out to 1.25e-06 TB.
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 megabit defined?
Exactly 1,000,000 bits, so exactly 125,000 bytes.