To convert horsepower hours to gigajoules, multiply by 0.002684519538.
The calculation uses 1 hp·h = 0.002684519538 GJ. 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 GJ = value in hp·h × 0.002684519538
hp·h- Input unit: horsepower hours
GJ- Output unit: gigajoules
How to use this calculator
- Enter a value in hp·h.
- Multiply by the stored conversion factor.
- Read the result in GJ; divide by the same factor to convert back.
Worked examples
Worked conversion
1 hp·h × 0.002684519538 ≈ 0.002684519538 GJ.
Reverse conversion
0.002684519538 GJ ÷ 0.002684519538 ≈ 1 hp·h. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.002684519538 GJ per hp·h.
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.
hp·h to GJ table
| hp·h | GJ (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.002684519538 |
| 2 | 0.005369039075 |
| 5 | 0.01342259769 |
| 10 | 0.02684519538 |
| 100 | 0.2684519538 |
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