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Convert TB to GB
1 TB = 1000 GB
Type a value in terabytes and the answer in gigabytes appears as you go. The conversion is exactly 1000 GB to the terabyte, 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 TB is exactly 1000 GB — 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.
Terabyte and Gigabyte
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.
A gigabyte is a billion bytes in the decimal sense used by drive manufacturers, phone plans and video sizes.
terabytes to gigabytes in practice
1 TB is 1000 GB
— a drive as the box describes it.
8 TB is 8000 GB
— a large desktop drive.
terabytes to gigabytes at a glance
| TB | GB |
|---|---|
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
Every figure here is computed from the same definition the calculator uses, so the table cannot drift away from the answer above it.
Convert TB to GB: common questions
How many gigabytes are in a terabyte?
Exactly 1000. One terabyte is 1000 gigabytes, 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.