Calories (mean) to Btu conversion

There is more than one type of Btu. Please use the appropriate variation from the list below.

  1. Calories (mean) to Btu (15°C)

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  2. Calories (mean) to Btu (15.6°C)

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  3. Calories (mean) to Btu (15.8°C, Canada)

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  4. Calories (mean) to Btu (15.8°C, ISO)

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  5. Calories (mean) to Btu (3.9°C)

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  6. Calories (mean) to Btu (I.T.)

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  7. Calories (mean) to Btu (I.T., pre-1956)

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  8. Calories (mean) to Btu (mean)

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  9. Calories (mean) to Btu (thermoc.)

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Calories (mean)

The mean calorie is the total amount of energy needed to heat one gram of air-free water from 0 to 100°C at standard atmospheric pressure, divided by 100.It's value is 4.19002 J

Btu

One BTU is the energy required to heat 1 avoirdupois pound of liquid water by 1 degree Fahrenheit, at a pressure of one atmosphere.