TiB to TB Converter
Convert tebibytes to terabytes — the conversion behind "why is my drive smaller than advertised". Results update as you type; exact factors shown.
One tebibyte (2⁴⁰) is 1.0995 terabyte (10¹²) — see the exact factor, not a rounded rule of thumb.
How the tib to tb converter works
Storage converts through the byte (8 bits). Drive makers and network speeds use decimal prefixes (1 GB = 10⁹ bytes); operating systems often report binary units (1 GiB = 2³⁰ = 1,073,741,824 bytes) — sometimes labelled "GB". The gap is 7.4% at the gigabyte and 10% at the terabyte.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common data conversions
| From | To | Units |
|---|---|---|
| 0.5 TiB | 0.5498 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 0.909 TiB | 0.9995 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 1 TiB | 1.0995 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 1.82 TiB | 2.0011 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 2 TiB | 2.199 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 3.64 TiB | 4.0022 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 4 TiB | 4.398 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 8 TiB | 8.7961 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 10 TiB | 10.9951 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 16 TiB | 17.5922 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 20 TiB | 21.9902 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
| 100 TiB | 109.9512 TB | tebibyte (2⁴⁰) to terabyte (10¹²) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in bytes |
|---|---|---|
| bit | bit | 0.125 byte |
| byte | B | 1 byte |
| kilobyte (10³) | kB | 1,000 byte |
| megabyte (10⁶) | MB | 1,000,000 byte |
| gigabyte (10⁹) | GB | 1,000,000,000 byte |
| terabyte (10¹²) | TB | 1,000,000,000,000 byte |
| kibibyte (2¹⁰) | KiB | 1,024 byte |
| mebibyte (2²⁰) | MiB | 1,048,576 byte |
| gibibyte (2³⁰) | GiB | 1,073,741,824 byte |
| tebibyte (2⁴⁰) | TiB | 1,099,511,627,776 byte |
FAQFrequently asked questions about data conversion
How many TB is 1 TiB?
1.0995 TB.
Why does a 1 TB drive show 931 GB?
Because the operating system is reporting 931 GiB and labelling it GB. The drive really does hold a decimal terabyte.
Is anyone being dishonest?
No. Storage makers use SI prefixes correctly; operating systems use binary sizes with decimal names.
What is 4 TiB in TB?
4.398 TB.
When did the binary prefixes arrive?
IEC standardised kibi, mebi, gibi and tebi in 1998.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.