A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Kilocalories to Therms
Convert Kilocalorie (kcal) to US therm (therm) instantly with an exact formula, conversion table, and FAQ.
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Convert kilocalories (kcal) to therms (therm) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
therm = kcal × 0.00003966613703
Results update instantly for Kilocalories to Therms conversions.
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Formula
therm = kcal × 0.00003966613703
kcal = therm × 25210.42065
Conversion table
| 1 kcal | 0.000040 therm |
| 5 kcal | 0.000198 therm |
| 10 kcal | 0.000397 therm |
| 20 kcal | 0.000793 therm |
| 50 kcal | 0.001983 therm |
| 100 kcal | 0.003967 therm |
| 500 kcal | 0.019833 therm |
| 1000 kcal | 0.039666 therm |
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How the formula works
Both kilocalorie and us therm measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilocalories by 0.00003966613703 to get therms. To reverse the conversion, multiply a us therm value by 25210.42065 to get back to kilocalories.
Frequently asked questions
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
What is US therm (therm)?
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
How do I convert kilocalories to therms?
Multiply the kilocalorie value by 0.00003966613703 to get the equivalent in therms. For example, 5 kcal × 0.00003966613703 = 0.000198 therm.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 0.00003966613703 is an exact, non-rounded value.
Can I convert therms back to kilocalories?
Yes. Divide the us therm value by 0.00003966613703, or multiply it by 25210.42065, to get kilocalories.
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About converting kilocalories to therms
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels. The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Use this calculator to move between kilocalories and therms accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.