Power and Energy
kcaltotherm
Convert kilocalories (kcal) to US therms (therm).
Factor1 kcal = 3.966614e-5 therm
Converter
kcal
Accepts numbers or expressions, e.g. 150 + 14.7
Result
therm
Rendered to 6 significant figures.
Formula
Formula
therm = kcal × 3.966614e-5
Multiply any value in kilocalories by 3.966614e-5 to obtain the value in US therms.
Worked example
Convert 100000 kcal to therm.
- 01Start with 100000 kcal.
- 02Multiply by the conversion factor: 100000 × 3.966614e-5 = 3.96661 therm.
Result100000 kcal = 3.96661 therm
Conversion table
| kcal | therm |
|---|---|
| 1 | 3.9666e-5 |
| 2 | 7.9332e-5 |
| 5 | 0.00019833 |
| 10 | 0.00039666 |
| 20 | 0.00079332 |
| 50 | 0.0019833 |
| 100 | 0.0039666 |
| 200 | 0.0079332 |
| 500 | 0.019833 |
| 1000 | 0.039666 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from kcal to therm?
1 kcal equals 3.966614e-5 therm. To convert, multiply the value in kilocalories by 3.966614e-5.
How do I convert 1 kcal to therm?
1 kcal = 3.96661e-5 therm. For any value, multiply by 3.966614e-5.
How do I convert therm back to kcal?
Divide by the same factor — or equivalently, multiply by 25210.42. So 1 therm = 25210.4 kcal.
When would I need to convert kilocalorie to US therm?
Energy conversions are needed when reconciling fuel/electrical billing, calculating thermal duties, and aligning calorimetry or HHV/LHV figures across data sources.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).