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Convert GB to TB
1 GB = 0.001 TB
Type a value in gigabytes and the answer in terabytes appears as you go. The conversion is exactly 0.001 TB to the gigabyte, and it happens on your own machine — this page asks nothing of a server once it has loaded.
Where it runs
In your browser. The number you type is never part of a request.
Exact by definition
1 GB is exactly 0.001 TB — a definition, not a rounded factor.
Answers as you type
No button, no wait. The worked answer is already on the page before any script runs.
Gigabyte and Terabyte
A gigabyte is a billion bytes in the decimal sense used by drive manufacturers, phone plans and video sizes.
A terabyte is a trillion bytes. A drive sold as 1 TB is exactly that — the space that seems to go missing is a unit disagreement, not a defect.
gigabytes to terabytes in practice
64 GB is 0.064 TB
— a modest phone.
1000 GB is 1 TB
— a drive sold as one terabyte.
gigabytes to terabytes at a glance
| GB | TB |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1000 | 1 |
Every figure here is computed from the same definition the calculator uses, so the table cannot drift away from the answer above it.
Convert GB to TB: common questions
How many terabytes are in a gigabyte?
Exactly 0.001. One gigabyte is 0.001 terabytes, and the box above will do it for any figure you type.
Is this conversion exact, or rounded?
The ratio is exact. It is not a rounded constant typed into a table: it is derived from the definitions of the two units, so it agrees with any other correct converter to as many digits as you care to compare.
Why does another converter show a slightly different number?
Almost always rounding rather than disagreement. Many converters cut the answer to two or four decimals, and some carry a factor that was rounded before the multiplication rather than after. The figures here are computed from the exact definitions and only rounded on the way to the screen.
Where these figures come from
The claims this page makes about data units are checkable, and these are the documents that settle them.
How this page works
The factor is a constant in the page and the arithmetic is four operations, so nothing is sent anywhere and nothing needs to be. The number you type never leaves the browser — there is no request for it to travel in.