# Watt-hours to Calories Conversion

Enter the energy in watt-hours below to get the value converted to calories.

**Results in Calories:**

## How to Convert Watt-hours to Calories

To convert a watt-hour measurement to a calorie measurement, multiply the energy by the conversion ratio. One watt-hour is equal to 860.42065 calories, so use this simple formula to convert:

The energy in calories is equal to the watt-hours multiplied by 860.42065.

**For example,**here's how to convert 5 watt-hours to calories using the formula above.

Watt-hours and calories are both units used to measure energy. Keep reading to learn more about each unit of measure.

## Watt-hours

The watt-hour is a measure of electrical energy equal to one watt of power over a one hour period.

Watt-hours are usually abbreviated as *Wh*, although the formally adopted expression is *W·h*. The abbreviation *W h* is also sometimes used. For example, 1 watt-hour can be written as 1 Wh, 1 W·h, or 1 W h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.^{[1]}

## 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.

## Watt-hour to Calorie Conversion Table

Watt-hours | Calories |
---|---|

1 Wh | 860.42 cal |

2 Wh | 1,721 cal |

3 Wh | 2,581 cal |

4 Wh | 3,442 cal |

5 Wh | 4,302 cal |

6 Wh | 5,163 cal |

7 Wh | 6,023 cal |

8 Wh | 6,883 cal |

9 Wh | 7,744 cal |

10 Wh | 8,604 cal |

11 Wh | 9,465 cal |

12 Wh | 10,325 cal |

13 Wh | 11,185 cal |

14 Wh | 12,046 cal |

15 Wh | 12,906 cal |

16 Wh | 13,767 cal |

17 Wh | 14,627 cal |

18 Wh | 15,488 cal |

19 Wh | 16,348 cal |

20 Wh | 17,208 cal |

21 Wh | 18,069 cal |

22 Wh | 18,929 cal |

23 Wh | 19,790 cal |

24 Wh | 20,650 cal |

25 Wh | 21,511 cal |

26 Wh | 22,371 cal |

27 Wh | 23,231 cal |

28 Wh | 24,092 cal |

29 Wh | 24,952 cal |

30 Wh | 25,813 cal |

31 Wh | 26,673 cal |

32 Wh | 27,533 cal |

33 Wh | 28,394 cal |

34 Wh | 29,254 cal |

35 Wh | 30,115 cal |

36 Wh | 30,975 cal |

37 Wh | 31,836 cal |

38 Wh | 32,696 cal |

39 Wh | 33,556 cal |

40 Wh | 34,417 cal |

## References

- Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9-EN.pdf