Bits to Terabytes
Type a value in either box to convert between bits and terabytes. The factor is 1.25e-13.
| Bits | Terabytes |
|---|---|
| 1 bit | 1.25e-13 TB |
| 2 bit | 2.5e-13 TB |
| 3 bit | 3.75e-13 TB |
| 5 bit | 6.25e-13 TB |
| 10 bit | 1.25e-12 TB |
| 25 bit | 3.125e-12 TB |
| 50 bit | 6.25e-12 TB |
| 100 bit | 1.25e-11 TB |
How to use
- Enter a value in the Bits field.
- The Terabytes figure appears immediately — no button to press.
- Typing in the Terabytes field converts back to Bits the same way.
- Use the reference table for the values that come up most often.
Bits to Terabytes formula
Converting bits to terabytes is a single multiplication by 1.25e-13.
TB = bit × 1.25e-13
Why this factor: the bit and the terabyte are both defined against the byte, so dividing one definition by the other gives 1.25e-13 directly. Both definitions are set out in full below.
To go the other way, divide by 1.25e-13 — or use the Terabytes to Bits converter, which is the same calculation reversed.
Worked example
Given 500 bit, multiplying by 1.25e-13 yields 6.25e-11 TB.
500 bit × 1.25e-13 = 6.25e-11 TB
The converter above does this for any value you type, in either direction.
What is a bit?
A bit is the smallest unit of digital information — a single binary digit, either 0 or 1.
Definition: One eighth of a byte. The name is a contraction of 'binary digit'.
Where it is used: Network and connection speeds, which are always quoted in bits per second.
Worth knowing: Lowercase 'b' is bits, uppercase 'B' is bytes. A 100 Mb/s connection delivers about 12.5 MB/s.
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.
Bits vs Terabytes
The bit 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 bit?
One bit equals 1.25e-13 terabytes.
What is the formula to convert bits to terabytes?
Multiply the number of bits by 1.25e-13. To reverse it, divide by 1.25e-13 instead.
How do I convert terabytes back to bits?
Divide by 1.25e-13, which is the same as multiplying by 8e+12.
How many terabytes are in 10 bits?
10 bit works out to 1.25e-12 TB.
Is there anything to watch out for with bits?
Lowercase 'b' is bits, uppercase 'B' is bytes. A 100 Mb/s connection delivers about 12.5 MB/s.
How is the bit defined?
One eighth of a byte. The name is a contraction of 'binary digit'.