Btu to Calories (20°C) conversion

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

  1. Btu (15°C) to Calories (20°C)

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  2. Btu (15.6°C) to Calories (20°C)

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  3. Btu (15.8°C, Canada) to Calories (20°C)

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  4. Btu (15.8°C, ISO) to Calories (20°C)

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  5. Btu (3.9°C) to Calories (20°C)

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  6. Btu (I.T.) to Calories (20°C)

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  7. Btu (I.T., pre-1956) to Calories (20°C)

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  8. Btu (mean) to Calories (20°C)

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  9. Btu (thermoc.) to Calories (20°C)

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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.

Calories (20°C)

One Calorie (20°C) is the amount of energy needed to raise the temperature of 1 gram of air-free water from 19.5 to 20.5 °C at atmospheric pressure.