Terabytes (TB) to Gigabytes (GB) Converter
Convert terabytes to gigabytes.
1 TB = 1,000 GB
How to convert TB to GB
File sizes here use the decimal (SI) system, the same one drive makers and network providers use. In that system 1 Terabyte is 1012 bytes and 1 Gigabyte is 109 bytes. Divide one by the other and you get the ratio between the two units: 1012 ÷ 109 = 103.
Terabyte is the bigger unit, so you multiply. Every TB holds 1,000 GB, which means the decimal point moves 3 places to the right.
These two sit side by side on the ladder (B → KB → MB → GB → TB → PB → EB → ZB → YB → RB → QB), so there is nothing to work out beyond remembering that every step is a factor of 1,000.
The formula
GB = TB × 1,0001 TB = 1,000 GB
Worked example 1: Converting 1 TB
1 TB × 1,000 = 1,000 GBThe decimal point moves 3 places to the right.
1 TB is a common size for a laptop SSD or an external hard drive.
Worked example 2: Converting 0.5 TB
0.5 TB × 1,000 = 500 GBThe decimal point moves 3 places to the right.
Worked example 3: Converting 12.75 TB
12.75 TB × 1,000 = 12,750 GBThe decimal point moves 3 places to the right.
Need the other direction? Open the GB to TB converter.
TB to GB examples
1 TB is a common size for a laptop SSD or an external hard drive. In gigabytes that is 1,000 GB.
| TB | GB |
|---|---|
| 1 TB | 1,000 GB |
| 2.5 TB | 2,500 GB |
| 10 TB | 10,000 GB |
| 50 TB | 50,000 GB |
| 100 TB | 100,000 GB |
| 500 TB | 500,000 GB |
| 1,000 TB | 1,000,000 GB |
Where TB to GB comes up
A terabyte is 1,000 gigabytes, about 250,000 photos at 4 MB each. Terabytes are how consumer SSDs, external drives, home NAS boxes and cloud storage plans are sold.
A gigabyte is 1,000 megabytes, about 250 photos at 4 MB each. Gigabytes are the language of phone storage, RAM, mobile data plans, game installs and USB sticks.
Going from terabytes down to gigabytes always gives a bigger number, because the unit you land on is smaller. It is the usual direction when a limit or a form asks for a smaller unit than the one you have in mind.
TB to GB FAQ
How many gigabytes are in 1 terabyte?
There are 1,000 gigabytes in 1 terabyte, so 1 TB = 1,000 GB.
Is TB to GB decimal or binary?
This page is decimal (SI), where 1 KB = 1,000 B. Operating systems often count in powers of 1,024 and still print KB, MB or GB, when they really mean KiB, MiB and GiB. At TB the two systems differ by about 10%.
How do I convert GB to TB?
Go the other way: divide by 1,000, which moves the decimal point 3 places to the left. The swap button on the converter does it for you.