Gigabyte to Terabyte (GB to TB) Converter
1 gigabyte equals 0.001 terabytes (TB) — multiply the number of gigabytes by 0.001, or divide by 1,000, to convert. In the decimal (SI) system a terabyte is exactly 1,000 gigabytes, the standard used on modern drives.
The formula
To convert gigabytes to terabytes, multiply by 0.001:
TB = GB × 0.001
For example, 250 GB × 0.001 = 0.25 TB. To reverse it, multiply terabytes by 1,000.
Conversion table
| Gigabytes (GB) | Terabytes (TB) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1,000 | 1 |
How to convert online
Let the tool place the decimal correctly:
- Enter your gigabyte value in the first box.
- Read the terabyte result instantly in the second box.
- Or type a terabyte value to convert back to gigabytes — it works both ways.
Use the Gigabyte to Terabyte Converter — free and instant in your browser.
Where this conversion is used
Buying storage often means comparing GB and TB figures side by side — a 500 GB drive is 0.5 TB, so it is half the size of a 1 TB model. The conversion helps size NAS arrays, cloud plans and backups, and lets you total many GB-sized volumes into terabytes.
FAQ
How many gigabytes are in a terabyte?
One terabyte equals 1,000 gigabytes in decimal terms, so 1 GB = 0.001 TB.
What is the formula to convert gigabytes to terabytes?
Multiply GB by 0.001: TB = GB × 0.001.
How do I convert terabytes back to gigabytes?
Multiply the terabyte value by 1,000. So 0.5 TB = 500 GB.
Is the conversion exact?
Yes, using decimal units. A binary tebibyte (TiB) is 1,024 GiB; this converter uses the decimal TB where 1 TB = 1,000 GB.
Related converters
- Terabyte to Gigabyte Converter
- Gigabyte to Petabyte Converter
- Gigabyte to Megabyte Converter
- Gigabyte to Byte Converter
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Recommended reading
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