# Watt-seconds to Kilojoules Conversion

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

**Results in Kilojoules:**

## How to Convert Watt-seconds to Kilojoules

To convert a watt-second measurement to a kilojoule measurement, divide the energy by the conversion ratio. One kilojoule is equal to 1,000 watt-seconds, so use this simple formula to convert:

The energy in kilojoules is equal to the watt-seconds divided by 1,000.

**For example,**here's how to convert 500 watt-seconds to kilojoules using the formula above.

Watt-seconds and kilojoules 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]}

## Kilojoules

One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 10^{3}. Kilojoules can be abbreviated as *kJ*; for example, 1 kilojoule can be written as 1 kJ.

## Watt-second to Kilojoule Conversion Table

Watt-seconds | Kilojoules |
---|---|

1 Ws | 0.001 kJ |

2 Ws | 0.002 kJ |

3 Ws | 0.003 kJ |

4 Ws | 0.004 kJ |

5 Ws | 0.005 kJ |

6 Ws | 0.006 kJ |

7 Ws | 0.007 kJ |

8 Ws | 0.008 kJ |

9 Ws | 0.009 kJ |

10 Ws | 0.01 kJ |

20 Ws | 0.02 kJ |

30 Ws | 0.03 kJ |

40 Ws | 0.04 kJ |

50 Ws | 0.05 kJ |

60 Ws | 0.06 kJ |

70 Ws | 0.07 kJ |

80 Ws | 0.08 kJ |

90 Ws | 0.09 kJ |

100 Ws | 0.1 kJ |

200 Ws | 0.2 kJ |

300 Ws | 0.3 kJ |

400 Ws | 0.4 kJ |

500 Ws | 0.5 kJ |

600 Ws | 0.6 kJ |

700 Ws | 0.7 kJ |

800 Ws | 0.8 kJ |

900 Ws | 0.9 kJ |

1,000 Ws | 1 kJ |

## 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