Convert Gigabytes to Terabytes (GB to TB)
1 gigabyte (GB) = 0.001 terabytes (TB). 1 TB = 1000 GB. Example: 500 GB = 500 × 0.001 = 0.5 TB.
Also searched as GB to TB, gigabytes to terabytes, gb in tb and how many TB is 500 GB.
1 GB = 0.001 TB
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gigabyte to terabyte converter to paste a column from Excel.
How to Convert Gigabyte to Terabyte
- 1 GB = 0.001 TB
- 1 TB = 1000 GB
- Example: convert 500 GB to TB: 500 GB = 500 × 0.001 TB = 0.5 TB
Formula
TB = GB ÷ 1000
Derivation from SI units:
- 1 GB = 10⁹ bytes = 8 × 10⁹ bits (decimal, SI).
- 1 TB = 10¹² bytes = 1000 GB.
- 1 GB = 8000000000 bit ÷ 8000000000000 bit per TB = 0.001 TB
Both units are defined exactly, so the factor is exact. Gigabyte definition: gigabyte; Terabyte definition: terabyte.
Worked examples
- A 500 GB SSD holds 0.5 TB.
500 GB × 0.001 = 0.5 TB - A 1500 GB photo library is 1.5 TB.
1500 GB × 0.001 = 1.5 TB
Gigabyte to Terabyte conversion table
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 1 GB | 0.001 TB |
| 2 GB | 0.002 TB |
| 4 GB | 0.004 TB |
| 8 GB | 0.008 TB |
| 16 GB | 0.016 TB |
| 32 GB | 0.032 TB |
| 64 GB | 0.064 TB |
| 100 GB | 0.1 TB |
| 128 GB | 0.128 TB |
| 256 GB | 0.256 TB |
| 500 GB | 0.5 TB |
| 1000 GB | 1 TB |
Where it's used
Drive, backup and library sizes in gigabytes are converted to terabytes to compare with hard drives, SSDs and cloud plans sold in TB. Divide by 1000.
Gigabyte to other data storage units
| Conversion | 1 GB equals |
|---|---|
| gigabyte to terabyte | 0.001 TB |
| gigabyte to byte | 1000000000 B |
| gigabyte to kilobyte | 1000000 kB |
| gigabyte to megabyte | 1000 MB |
| gigabyte to bit | 8000000000 bit |
| gigabyte to megabit | 8000 Mbit |
| gigabyte to kibibyte | 976562.5 KiB |
| gigabyte to mebibyte | 953.6743164 MiB |
Show 5 more units
| gigabyte to gibibyte | 0.9313225746 GiB |
|---|---|
| gigabyte to kilobit | 8000000 kbit |
| gigabyte to gigabit | 8 Gbit |
| gigabyte to petabyte | 0.000001 PB |
| gigabyte to tebibyte | 0.0009094947018 TiB |
Frequently asked questions
How many GB make a TB?
Exactly 1000 decimal gigabytes: 1 GB = 0.001 TB. In binary units 1 TiB = 1024 GiB.
How many terabytes are in 1 gigabyte?
1 GB = 0.001 TB.
How do I convert gigabytes to terabytes?
Multiply the value in GB by 0.001, or divide it by 1000. For example, 500 GB × 0.001 = 0.5 TB.
Is the GB to TB conversion exact?
Yes. Both units are defined exactly, and 1 GB is exactly 0.001 TB.
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 Gigabytes to Terabytes (GB to TB). Retrieved October 25, 2026, from https://scientificconverters.com/data-storage/gigabytes-to-terabytes/
IEEE
Scientific Converters, "Convert Gigabytes to Terabytes (GB to TB)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/data-storage/gigabytes-to-terabytes/