To convert gigabytes to terabytes, multiply by 0.001.
The calculation uses 1 GB = 0.001 TB. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in TB = value in GB × 0.001
GB- Input unit: gigabytes
TB- Output unit: terabytes
How to use this calculator
- Enter a value in GB.
- Multiply by the stored conversion factor.
- Read the result in TB; divide by the same factor to convert back.
Worked examples
Worked conversion
1 GB × 0.001 ≈ 0.001 TB.
Reverse conversion
0.001 TB ÷ 0.001 ≈ 1 GB. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.001 TB per GB.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
GB to TB table
| GB | TB (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 100 | 0.1 |
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