Calorie conversions

Convert calories to

calorie (thermochemical) (unit of energy), pl. calories (thermochemical), abbr. cal

The calorie conversion selector on this page selects the energy measurement unit to convert to starting from calories (cal). To make a conversion starting from a unit of energy other than calorie, simply click on the "Reset" button.

About calorie

The calorie (thermochemical) is a unit of energy equal to 4.184 joules (1 cal = 4.184 J), the SI derived unit of energy.

The calorie (thermochemical) is also equal to 0.004184 kilojoules (kJ), or 0.001 kilocalories (thermochemical) (kcal), or 10-9 gigacalories (thermochemical) (Gcal), or 0.003965667 British thermal units (IT) (BTU), or 0.002203148 Celsius heat units (IT) (CHU), or 0.00116222222 watt hours (Wh) or 1.16222222 × 10-6 kilowatt hours (kWh).

The calorie is the energy required to increase the temperature of one gram of water by one degree Celsius (1.8 degrees Fahrenheit) at a constant pressure of one atmosphere.

The calorie definition varies as follows:

  • The calorie (th) (cal) is equal to 4.184 joules
  • The calorie (IT) (cal) is equal to 4.1868 joules
  • The calorie (mean) (cal) is equal to about 4.19002 joules
  • The calorie (4 °C) (cal) is equal to about 4.2045 joules
  • The calorie (15 °C) (cal) is equal to 4.1855 joules
  • The calorie (20 °C) (cal) is equal to about 4.1819 joules

Symbol: cal

Plural: calories

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