# Watt-seconds to Calories Conversion

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

**Results in Calories:**

## How to Convert Watt-seconds to Calories

To convert a watt-second measurement to a calorie measurement, multiply the energy by the conversion ratio. One watt-second is equal to 0.239006 calories, so use this simple formula to convert:

The energy in calories is equal to the watt-seconds multiplied by 0.239006.

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

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

## Watt-seconds

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as *Ws*, although the formally adopted expression is *W·s*. The abbreviation *W s* is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

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-second to Calorie Conversion Table

Watt-seconds | Calories |
---|---|

1 Ws | 0.239006 cal |

2 Ws | 0.478011 cal |

3 Ws | 0.717017 cal |

4 Ws | 0.956023 cal |

5 Ws | 1.195 cal |

6 Ws | 1.434 cal |

7 Ws | 1.673 cal |

8 Ws | 1.912 cal |

9 Ws | 2.1511 cal |

10 Ws | 2.3901 cal |

11 Ws | 2.6291 cal |

12 Ws | 2.8681 cal |

13 Ws | 3.1071 cal |

14 Ws | 3.3461 cal |

15 Ws | 3.5851 cal |

16 Ws | 3.8241 cal |

17 Ws | 4.0631 cal |

18 Ws | 4.3021 cal |

19 Ws | 4.5411 cal |

20 Ws | 4.7801 cal |

21 Ws | 5.0191 cal |

22 Ws | 5.2581 cal |

23 Ws | 5.4971 cal |

24 Ws | 5.7361 cal |

25 Ws | 5.9751 cal |

26 Ws | 6.2141 cal |

27 Ws | 6.4532 cal |

28 Ws | 6.6922 cal |

29 Ws | 6.9312 cal |

30 Ws | 7.1702 cal |

31 Ws | 7.4092 cal |

32 Ws | 7.6482 cal |

33 Ws | 7.8872 cal |

34 Ws | 8.1262 cal |

35 Ws | 8.3652 cal |

36 Ws | 8.6042 cal |

37 Ws | 8.8432 cal |

38 Ws | 9.0822 cal |

39 Ws | 9.3212 cal |

40 Ws | 9.5602 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