Convert terabyte to tebibyte.
TB to TiB — formula, reference values, and a live converter.
Convert terabyte (TB) to tebibyte (TiB). This is a fixed-ratio conversion — multiply the input by the factor below.
Formula
TiB = TB × 0.909495
Reference values
| TB (terabyte) | TiB (tebibyte) |
|---|---|
| 1 TB | 0.90949 TiB |
| 2 TB | 1.819 TiB |
| 5 TB | 4.5475 TiB |
| 10 TB | 9.0949 TiB |
| 25 TB | 22.737 TiB |
| 50 TB | 45.475 TiB |
| 100 TB | 90.949 TiB |
| 500 TB | 454.75 TiB |
| 1000 TB | 909.49 TiB |
Things to watch for
- 1 KB can mean 1000 bytes (decimal, SI) or 1024 bytes (binary, KiB). Storage manufacturers use decimal; OSes used to use binary and called it KB — hence the discrepancy in 'my hard drive says 1 TB but shows 931 GB.'
- The 'binary' prefixes Ki, Mi, Gi, Ti were standardized by IEC in 1998 specifically to remove this ambiguity. Use them when precision matters.
- Network speeds in bits per second (Mbps, Gbps); file sizes in bytes (MB, GB). 100 Mbps ≈ 12.5 MB/s.
What is a terabyte?
One terabyte equals 1,000 gigabytes (1,000,000,000,000 bytes) in the SI sense. Hard drive and SSD capacities, large data archives, and storage planning.
What is a tebibyte?
One tebibyte equals 1,099,511,627,776 bytes (1024⁴) — the binary version of the terabyte. Operating systems, file systems, and RAM specifications. Windows reports drive sizes in TiB even when it labels them "TB".
How to convert terabyte to tebibyte
To convert a value from terabyte (TB) to tebibyte (TiB), apply the conversion factor shown in the formula above. The calculation is the same whether you do it by hand, in a spreadsheet, or with the live converter on this page.
Steps:
- Take your input value in TB.
- Apply the formula
TiB = TB × 0.909495. - The result is your value in TiB.
For repeated calculations, save the formula in a spreadsheet or use the live converter at the top of this page — it handles the math automatically and displays the result as you type.
Frequently asked questions
How do I convert TB to TiB?
Apply the formula TB → TiB shown above, or just type your value into the converter at the top of this page. The result updates instantly.
Which is bigger, TB or TiB?
This depends on the conversion ratio in the formula. If the factor multiplied by your value gives a larger number, then TiB is the smaller unit (so it takes more of them to express the same quantity). If the result is smaller, then TiB is the larger unit.
When would I use TB versus TiB?
Both units measure data, so the choice depends on context. Terabyte is typically used for file sizes, storage capacity, and network transfer; tebibyte similarly. Most professional fields standardize on one or the other based on regional conventions or technical tradition.
How precise is this TB to TiB conversion?
The conversion factor shown is the internationally defined exact value (or the best-published approximation if the relationship is irrational, like degrees-to-radians). The live converter on this page uses double-precision floating-point math, accurate to about 15 significant digits — far beyond any practical engineering need.
Is the conversion ratio exact, or an approximation?
Most unit conversions between SI metric units, and between SI and US customary units, have been formally defined as exact values since the 1959 international yard-pound agreement and subsequent SI redefinitions. Exceptions are unit pairs that involve irrational numbers (radians, e.g.) or empirical conversions (like food calories, which depend on temperature). When in doubt, consult the formula at the top of this page.