Terabytes to Bits Converter

Terabytes to Bits

Convert terabytes (TB) to bits (b). Both measure digital storage, and the conversion comes up in computing, storage, internet work.

The Formula

`` bits = terabytes × 8000000000000 terabytes = bits × 1.25e-13 `

One terabyte is 8,000,000,000,000 bits, and one bit is 1.2500e-13 terabytes.

Conversion Table

Terabytes	Bits
1 TB	8,000,000,000,000 b
2 TB	16,000,000,000,000 b
5 TB	40,000,000,000,000 b
10 TB	80,000,000,000,000 b
25 TB	200,000,000,000,000 b
50 TB	400,000,000,000,000 b
100 TB	800,000,000,000,000 b
500 TB	4,000,000,000,000,000 b
1,000 TB	8,000,000,000,000,000 b

The Other Direction

Bits	Terabytes
1 b	1.2500e-13 TB
2 b	2.5000e-13 TB
5 b	6.2500e-13 TB
10 b	1.2500e-12 TB
25 b	3.1250e-12 TB
50 b	6.2500e-12 TB
100 b	1.2500e-11 TB
500 b	6.2500e-11 TB
1,000 b	1.2500e-10 TB

What Each Unit Is

Terabytes (TB) — 1,000,000,000,000 bytes in decimal usage. The unit of consumer drives since the late 2000s.

Bits (b) — a single binary digit — the smallest unit of information. Named by John Tukey in 1946, from "binary digit".

A Sense of Scale

• A 1 TB drive shows as 931 GiB in Windows
• A 4K film master is several TB
• Network speeds are quoted in bits per second
• A byte is 8 bits

Precision

The factor 8000000000000 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.

In Code

`javascript const terabyteToBit = (value) => value * 8000000000000; ``

Where This Conversion Comes Up

• Computing
• Storage
• Internet
• Media
• Backups

How Many Decimals Do You Need?

Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 TB with the factor truncated at each decimal place:

Decimals kept	Factor	137 TB becomes	Error
0	8000000000000	1,096,000,000,000,000	—
1	8000000000000	1,096,000,000,000,000	—
2	8000000000000	1,096,000,000,000,000	—
3	8000000000000	1,096,000,000,000,000	—
4	8000000000000	1,096,000,000,000,000	—

A rule that holds for any conversion: round once, at the end. Rounding the factor and then multiplying compounds the error through every subsequent calculation, while carrying full precision and rounding the final answer does not.

The right number of significant figures is set by your input, not by the converter. If you measured terabytes to three significant figures, the answer in bits is only good to three — writing more digits claims precision the measurement never had.

Other Conversions From Terabytes

The same value in every other unit this converter supports for data:

From	To	Unit
1 TB	1,000,000,000,000 B	Bytes
1 TB	8,000,000,000 Kb	Kilobits
1 TB	1,000,000,000 KB	Kilobytes
1 TB	8,000,000 Mb	Megabits
1 TB	1,000,000 MB	Megabytes
1 TB	1,000 GB	Gigabytes

Chaining conversions works — terabytes to metres to feet gives the same answer as terabytes to feet — but each step rounds, so a chain of three conversions carries three roundings. Convert directly where a direct factor exists.