The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage.
Therms to Kilocalories
Convert US therm (therm) to Kilocalorie (kcal) instantly with an exact formula, conversion table, and FAQ.
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Convert therms (therm) to kilocalories (kcal) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
kcal = therm × 25210.42065
Results update instantly for Therms to Kilocalories conversions.
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Formula
kcal = therm × 25210.42065
therm = kcal × 0.00003966613703
Conversion table
| 1 therm | 25210.420650 kcal |
| 5 therm | 126052.103250 kcal |
| 10 therm | 252104.206501 kcal |
| 20 therm | 504208.413002 kcal |
| 50 therm | 1.260521e+06 kcal |
| 100 therm | 2.521042e+06 kcal |
| 500 therm | 1.260521e+07 kcal |
| 1000 therm | 2.521042e+07 kcal |
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How the formula works
Both us therm and kilocalorie measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in therms by 25210.42065 to get kilocalories. To reverse the conversion, multiply a kilocalorie value by 0.00003966613703 to get back to therms.
Frequently asked questions
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.
What is Kilocalorie (kcal)?
A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
How do I convert therms to kilocalories?
Multiply the us therm value by 25210.42065 to get the equivalent in kilocalories. For example, 5 therm × 25210.42065 = 126052.103250 kcal.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 25210.42065 is an exact, non-rounded value.
Can I convert kilocalories back to therms?
Yes. Divide the kilocalorie value by 25210.42065, or multiply it by 0.00003966613703, to get therms.
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About converting therms to kilocalories
The US therm is a natural-gas billing unit equal to 100,000 BTU, used by utilities to measure gas usage. A kilocalorie (kcal) equals 1,000 small calories and is the unit behind the food "Calorie" shown on nutrition labels.
Use this calculator to move between therms and kilocalories accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.