To convert terabytes to petabytes, multiply by 0.001.
The calculation uses 1 TB = 0.001 PB. 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 PB = value in TB × 0.001
TB- Input unit: terabytes
PB- Output unit: petabytes
How to use this calculator
- Enter a value in TB.
- Multiply by the stored conversion factor.
- Read the result in PB; divide by the same factor to convert back.
Worked examples
Worked conversion
1 TB × 0.001 ≈ 0.001 PB.
Reverse conversion
0.001 PB ÷ 0.001 ≈ 1 TB. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.001 PB per TB.
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.
TB to PB table
| TB | PB (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 100 | 0.1 |
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