Convert Terabytes to Gigabytes (TB to GB)
1 terabyte (TB) = 1000 gigabytes (GB). 1 GB = 0.001 TB. Example: 1 TB = 1 × 1000 = 1000 GB.
Also searched as TB to GB, terabytes to gigabytes, 1 TB in GB and how many gigabytes in a terabyte.
1 TB = 1000 GB
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk terabyte to gigabyte converter to paste a column from Excel.
How to Convert Terabyte to Gigabyte
- 1 TB = 1000 GB
- 1 GB = 0.001 TB
- Example: convert 1 TB to GB: 1 TB = 1 × 1000 GB = 1000 GB
Formula
GB = TB × 1000
Derivation from SI units:
- 1 TB = 10¹² bytes = 1000 GB.
- 1 GB = 10⁹ bytes = 8 × 10⁹ bits (decimal, SI).
- 1 TB = 8000000000000 bit ÷ 8000000000 bit per GB = 1000 GB
Both units are defined exactly, so the factor is exact. Terabyte definition: terabyte; Gigabyte definition: gigabyte.
Worked examples
- A 1 TB drive is 1000 GB.
1 TB × 1000 = 1000 GB - A 2 TB cloud plan holds 2000 GB.
2 TB × 1000 = 2000 GB
Terabyte to Gigabyte conversion table
| Terabytes (TB) | Gigabytes (GB) |
|---|---|
| 0.5 TB | 500 GB |
| 1 TB | 1000 GB |
| 2 TB | 2000 GB |
| 4 TB | 4000 GB |
| 8 TB | 8000 GB |
| 10 TB | 10000 GB |
| 12 TB | 12000 GB |
| 16 TB | 16000 GB |
| 20 TB | 20000 GB |
| 24 TB | 24000 GB |
Where it's used
Drive and cloud capacities in terabytes are converted to gigabytes to work out how many games, videos or backups they hold. Multiply by 1000.
Terabyte to other data storage units
| Conversion | 1 TB equals |
|---|---|
| terabyte to gigabyte | 1000 GB |
| terabyte to byte | 1000000000000 B |
| terabyte to kilobyte | 1000000000 kB |
| terabyte to megabyte | 1000000 MB |
| terabyte to bit | 8000000000000 bit |
| terabyte to megabit | 8000000 Mbit |
| terabyte to kibibyte | 976562500 KiB |
| terabyte to mebibyte | 953674.3164 MiB |
Show 5 more units
| terabyte to gibibyte | 931.3225746 GiB |
|---|---|
| terabyte to kilobit | 8000000000 kbit |
| terabyte to gigabit | 8000 Gbit |
| terabyte to petabyte | 0.001 PB |
| terabyte to tebibyte | 0.9094947018 TiB |
Frequently asked questions
How many GB are in 1 TB?
Exactly 1000 GB in decimal units, the way drives are sold.
Why does my 1 TB drive show only 931 GB?
Windows counts in binary gibibytes but labels them GB: 10¹² bytes ÷ 2³⁰ = 931.3 GiB. No space is missing.
How many gigabytes are in 1 terabyte?
1 TB = 1000 GB.
How do I convert terabytes to gigabytes?
Multiply the value in TB by 1000. For example, 1 TB × 1000 = 1000 GB.
Is the TB to GB conversion exact?
Yes. Both units are defined exactly, and 1 TB is exactly 1000 GB.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7 (SI prefixes); hertz, Table 4.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Terabytes to Gigabytes (TB to GB). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/terabytes-to-gigabytes/
IEEE
Scientific Converters, "Convert Terabytes to Gigabytes (TB to GB)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/terabytes-to-gigabytes/