Therms to Calories Conversion

Enter the energy in therms below to get the value converted to calories.

Results in Calories:
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1 therm = 25,216,440.07218 cal
Do you want to convert calories to therms?

How to Convert Therms to Calories

To convert a therm measurement to a calorie measurement, multiply the energy by the conversion ratio.

Since one therm is equal to 25,216,440.07218 calories, you can use this simple formula to convert:

calories = therms × 25,216,440.07218

The energy in calories is equal to the therms multiplied by 25,216,440.07218.

For example, here's how to convert 5 therms to calories using the formula above.
5 therms = (5 × 25,216,440.07218) = 126,082,200.3609 cal

Therms and calories are both units used to measure energy. Keep reading to learn more about each unit of measure.


One therm is a measure of heat energy equal to 100,000 BTU, which are equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. Therms are often used by natural gas companies to measure the heat equivalent of gas used.

The therm is a US customary unit of energy.


One calorie is equal to the heat needed to raise the temperature of one gram of water from 14.5 to 15.5 degrees Celsius.

When measuring the energy content in foods, the large calorie, or kilocalorie is used, but it's often still just called a "calorie." When both the calorie and large calorie are used in the same context it is common to refer to the calorie as a "small calorie."

Calories can be abbreviated as cal; for example, 1 calorie can be written as 1 cal.

Therm to Calorie Conversion Table

Therm measurements converted to calories
Therms Calories
0.0000001 2.5216 cal
0.0000002 5.0433 cal
0.0000003 7.5649 cal
0.0000004 10.09 cal
0.0000005 12.61 cal
0.0000006 15.13 cal
0.0000007 17.65 cal
0.0000008 20.17 cal
0.0000009 22.69 cal
0.00000001 0.252164 cal
0.0000001 2.5216 cal
0.000001 25.22 cal
0.00001 252.16 cal
0.0001 2,522 cal
0.001 25,216 cal
0.01 252,164 cal
0.1 2,521,644 cal
1 25,216,440 cal