# Watt-seconds to Kilowatt-hours Conversion

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

**Results in Kilowatt-hours:**

## How to Convert Watt-seconds to Kilowatt-hours

To convert a watt-second measurement to a kilowatt-hour measurement, divide the energy by the conversion ratio. One kilowatt-hour is equal to 3,600,000 watt-seconds, so use this simple formula to convert:

The energy in kilowatt-hours is equal to the watt-seconds divided by 3,600,000.

**For example,**here's how to convert 5,000,000 watt-seconds to kilowatt-hours using the formula above.

Watt-seconds and kilowatt-hours 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]}

## Kilowatt-hours

A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Kilowatt-hours are usually abbreviated as *kWh*, although the formally adopted expression is *kW·h*. The abbreviation *kW h* is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW h.

## Watt-second to Kilowatt-hour Conversion Table

Watt-seconds | Kilowatt-hours |
---|---|

1 Ws | 0.00000027778 kWh |

2 Ws | 0.00000055556 kWh |

3 Ws | 0.00000083333 kWh |

4 Ws | 0.0000011111 kWh |

5 Ws | 0.0000013889 kWh |

6 Ws | 0.0000016667 kWh |

7 Ws | 0.0000019444 kWh |

8 Ws | 0.0000022222 kWh |

9 Ws | 0.0000025 kWh |

10 Ws | 0.0000027778 kWh |

100 Ws | 0.000027778 kWh |

1,000 Ws | 0.000278 kWh |

10,000 Ws | 0.002778 kWh |

100,000 Ws | 0.027778 kWh |

1,000,000 Ws | 0.277778 kWh |

10,000,000 Ws | 2.7778 kWh |

## 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