How many terabytes are in a gigabyte?

1 GB = 0.001 TB. To convert any amount, multiply by 0.001.

How do you convert gigabytes to terabytes?

Multiply the number of gigabytes by 0.001 to get terabytes. The formula is shown in the "How it's calculated" section above.

Where does the conversion factor come from?

It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.

Unit converter — Data storage

Gigabytes to terabytes converter

Convert gigabytes (GB) to terabytes (TB). Source-cited conversion factor, exact to the displayed precision.

Results are mathematically exact for the displayed precision. How we calculate.

How it's calculated

Convert gigabytes to terabytes— the formula

Gigabytes convert to terabytes by multiplying by the published conversion factor. The factor below is exact to the precision shown, sourced from the citation under the formula.

TB = GB × 0.001

GB = TB × 1000

IEC 80000-13 + NIST: KB/MB/GB use decimal prefixes (10³, 10⁶, 10⁹). 1 byte = 8 bits.

Questions

Frequently asked questions

How many terabytes are in a gigabyte?
1 GB = 0.001 TB. To convert any amount, multiply by 0.001.
How do you convert gigabytes to terabytes?
Multiply the number of gigabytes by 0.001 to get terabytes. The formula is shown in the "How it's calculated" section above.
Where does the conversion factor come from?
It's a published international standard. Most are defined exactly by international agreement (e.g. 1 inch = 25.4 mm exactly, 1 lb = 0.45359237 kg exactly). Source citations are listed under the formula above.