Kilocalories (kcal) - Energy Conversions
A kilocalorie is a unit of energy in the International System of Units (SI). The symbol for kilocalorie is kcal. A kilocalorie is also called a "large calorie" or "kilogram calorie".
A kilocalorie is measured as the quantity of heat required to raise the temperature of 1 kilogram of water by 1°C from a standard initial temperature at a pressure of 1 atmosphere. The base unit for a kilocalorie is calorie and the prefix is kilo. The prefix kilo is derived from the Greek chilioi meaning thousand and is symbolized as k. Kilo denotes a factor of 1,000 which means that there are 1,000 calories in a kilocalorie.
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Select one of the kilocalorie conversions below:
Unit Summary
This table provides a summary of the Energy units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| calories (thermochemical) | cal | International System of Units (SI) |
| kilocalories | kcal | International System of Units (SI) |
| British Thermal Unit | BTU or Btu | Imperial System |
| joules | J | International System of Units (SI) |
| kilojoules | kJ | International System of Units (SI) |
| megajoules | MJ | International System of Units (SI) |
| gigajoules | GJ | International System of Units (SI) |
| terajoules | TJ | International System of Units (SI) |
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