How many gigabytes are in a terabyte?

1 TB = 1000 GB. To convert any amount, multiply by 1000.

How do you convert terabytes to gigabytes?

Multiply the number of terabytes by 1000 to get gigabytes. 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

Terabytes to gigabytes converter

Convert terabytes (TB) to gigabytes (GB). 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 terabytes to gigabytes— the formula

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

GB = TB × 1000

TB = GB × 0.001

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

Questions

Frequently asked questions

How many gigabytes are in a terabyte?
1 TB = 1000 GB. To convert any amount, multiply by 1000.
How do you convert terabytes to gigabytes?
Multiply the number of terabytes by 1000 to get gigabytes. 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.