# Calories to British Thermal Units Conversion

Enter the energy in calories below to get the value converted to british thermal units.

**Results in British Thermal Units:**

## How to Convert Calories to British Thermal Units

To convert a calorie measurement to a british thermal unit measurement, multiply the energy by the conversion ratio. One calorie is equal to 0.003966 british thermal units, so use this simple formula to convert:

The energy in british thermal units is equal to the calories multiplied by 0.003966.

**For example,**here's how to convert 500 calories to british thermal units using the formula above.

Calories and british thermal units are both units used to measure energy. Keep reading to learn more about each unit of measure.

## Calories

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.

## British Thermal Units

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as *BTU*; for example, 1 british thermal unit can be written as 1 BTU.

## Calorie to British Thermal Unit Conversion Table

Calories | British Thermal Units |
---|---|

1 cal | 0.003966 BTU |

2 cal | 0.007931 BTU |

3 cal | 0.011897 BTU |

4 cal | 0.015863 BTU |

5 cal | 0.019828 BTU |

6 cal | 0.023794 BTU |

7 cal | 0.02776 BTU |

8 cal | 0.031725 BTU |

9 cal | 0.035691 BTU |

10 cal | 0.039657 BTU |

20 cal | 0.079313 BTU |

30 cal | 0.11897 BTU |

40 cal | 0.158627 BTU |

50 cal | 0.198283 BTU |

60 cal | 0.23794 BTU |

70 cal | 0.277597 BTU |

80 cal | 0.317253 BTU |

90 cal | 0.35691 BTU |

100 cal | 0.396567 BTU |

200 cal | 0.793133 BTU |

300 cal | 1.1897 BTU |

400 cal | 1.5863 BTU |

500 cal | 1.9828 BTU |

600 cal | 2.3794 BTU |

700 cal | 2.776 BTU |

800 cal | 3.1725 BTU |

900 cal | 3.5691 BTU |

1,000 cal | 3.9657 BTU |