To convert btu per hour to kilocalories per hour, multiply by 0.2521644007.
The calculation uses 1 BTU/h = 0.2521644007 kcal/h. 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 kcal/h = value in BTU/h × 0.2521644007
BTU/h- Input unit: btu per hour
kcal/h- Output unit: kilocalories per hour
How to use this calculator
- Enter a value in BTU/h.
- Multiply by the stored conversion factor.
- Read the result in kcal/h; divide by the same factor to convert back.
Worked examples
Worked conversion
1 BTU/h × 0.2521644007 ≈ 0.2521644007 kcal/h.
Reverse conversion
0.2521644007 kcal/h ÷ 0.2521644007 ≈ 1 BTU/h. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 0.2521644007 kcal/h per BTU/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.
BTU/h to kcal/h table
| BTU/h | kcal/h (rounded) |
|---|---|
| 0 | 0 |
| 1 | 0.2521644007 |
| 2 | 0.5043288014 |
| 5 | 1.260822004 |
| 10 | 2.521644007 |
| 100 | 25.21644007 |
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