TB to GB formula
To convert terabytes to gigabytes, multiply the number of terabytes by 1,000. In symbols: GB = TB × 1,000.
One terabyte equals 1,000 gigabytes, and one gigabyte equals 0.001 terabytes. By SI definition 1 TB is exactly 1,000 GB. The binary TiB is 1,024 GiB, which is why a 1 TB drive shows near 931 GiB.
Worked example
Suppose you have 2 terabytes and need the answer in gigabytes.
- Write the formula: GB = TB × 1,000.
- Put in the number: 2 × 1,000 = 2,000.
- Round to suit the job. 2,000 GB is accurate enough for most everyday uses.
So 2 TB is 2,000 GB. To check, convert back: 2,000 GB is 2 TB.
Common terabytes to gigabytes values
| terabytes (TB) | gigabytes (GB) |
|---|---|
| 1 | 1,000 |
| 2 | 2,000 |
| 5 | 5,000 |
| 10 | 10,000 |
| 20 | 20,000 |
| 50 | 50,000 |
| 100 | 100,000 |
Reference points
Some familiar amounts in terabytes, converted to gigabytes:
- 0.5 TB, a small laptop SSD: 500 GB
- 1 TB, a common external drive: 1,000 GB
- 2 TB, a gaming console drive: 2,000 GB
- 16 TB, a large NAS bay: 16,000 GB
Where you will use it
External drives, cloud plans and NAS boxes are sold in terabytes while individual backups and games are in gigabytes. Converting helps you plan how many games or backups fit.
Quick mental math
Move the decimal point three places right. A game of 100 GB means ten of them fill a 1 TB drive.
Going the other way
Need the reverse? Use the GB to TB converter. For comparison, 1 GB is 0.001 TB. To compare every data size unit at once, open the data size converter.
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