Gigabytes to Terabytes Converter
One Gigabyte equals 0.001 Terabytes (1 GB = 0.001 TB). Multiply a Gigabyte value by 0.001 to get the equivalent in Terabytes. Use the calculator above for your value, or check the examples and reference table below.
Formula
TB = GB × 0.001
Multiply the Gigabyte value by 0.001 to get the equivalent value in Terabytes.
Example Conversions
1 Gigabyte (GB)
0.001 Terabyte (TB)
5 Gigabyte (GB)
0.005 Terabyte (TB)
10 Gigabyte (GB)
0.01 Terabyte (TB)
25 Gigabyte (GB)
0.025 Terabyte (TB)
100 Gigabyte (GB)
0.1 Terabyte (TB)
Conversion Table
| Gigabyte (GB) | Terabyte (TB) |
|---|---|
| 0.1 | 0.0001 |
| 0.5 | 0.0005 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1000 | 1 |
How to Convert Manually
Use these steps to convert Gigabyte values to Terabyte without the calculator.
- Write down the value in Gigabyte (GB) that you want to convert.
- Multiply that value by 0.001.
- For example, 10 Gigabytes × 0.001 = 0.01 Terabytes.
- Label the result as Terabyte (TB).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Gigabyte and one Terabyte.
About Gigabyte and Terabyte
The gigabyte is an SI decimal data unit equal to exactly 1,000 megabytes, or one billion bytes. Device storage and mobile data plans are commonly sold in gigabytes. The terabyte is an SI decimal data unit equal to exactly 1,000 gigabytes, or one trillion bytes. Drives, backup systems, and media libraries are commonly terabyte-scale. One Gigabyte equals 0.001 Terabytes (1 GB = 0.001 TB). Gigabyte is used in phone and laptop storage and in cloud storage quotas. Terabyte is used in hard drive and SSD capacity.
Precision and Rounding:This converter keeps SI decimal prefixes (1 KB = 1,000 bytes) separate from IEC binary prefixes (1 KiB = 1,024 bytes). Match the symbol used by your source before converting because some operating-system interfaces display binary quantities with decimal labels.
See our guide to megabits vs. megabytes if you're unsure which one your download speed is quoted in.
Data units follow NIST guidance: decimal SI prefixes use powers of 1,000, while IEC binary prefixes use powers of 1,024 (reference).
Worked Example
15Gigabytes equals0.015Terabytes.
15 GB × 0.001 = 0.015 TB
FAQ
How do I convert Gigabyte to Terabyte?
Multiply the Gigabyte value by 0.001 to get the equivalent value in Terabytes.
What is the formula for Gigabyte to Terabyte?
The formula is TB = GB × 0.001.
How many Terabytes are in 1 Gigabyte?
1 Gigabyte equals 0.001 Terabytes.
Can I convert Terabyte back to Gigabyte?
Yes. 1 Terabyte equals 1000 Gigabytes, and the related converter can reverse the calculation.
What are common names for Gigabyte and Terabyte?
Gigabyte is shown as GB and may also be searched as gigabytes, gb, decimal gigabyte. Terabyte is shown as TB and may also be searched as terabytes, tb, decimal terabyte.
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