# What is a Kilowatt?

A kilowatt is a measure of **power**, which is equal to **1000 watts** (much like 1 kilogram is equal to 1000 grams).

## Great, but what, then, what is a watt?

- A watt is also measurement of
**power**.

**Power** is a measurement of the **energy** produced (or consumed) **over a period of time**.

If **energy** were to be compared to **distance**, then **power** would be the measure of **speed**. i.e. just like **speed** is the distance travelled over a certain amount of time, **power** is the amount of energy consumed (or produced) over a certain amount of time.

## Kilowatts (or watts) on your home appliances

Each appliance in your house (your refrigerator, your lamps, your computer) has a definite power consumption, in **watts**.

A laptop computer, when plugged, will consume what is displayed on its charger

Here, the charger's consumption when charging is **65W**, (65 watts). This is the charger's power consumption.

Appliance | Power consumption |
---|---|

Traditional light bulb |
60 watts |

Ecological light bulb | 15 watts |

Laptop computer | 50 watts |

Microwave | 600 watts |

Electric oven | 2000 watts |

Washing machine | 500 watts |

Dishwasher | 1200 watts |

While a **kilowatt** describes the **power** consumption of an appliance, it will **not** describe the actual power an appliance has used **over a whole day**, week, or month. Appliances are **not always using 100% of their power**. For example, microwaves only use power when they are heating something. You refrigerator is only using power a few times every hour or so (when you can hear it making a vibrating noise). The rest of the time, it is using little or no power (it might still use a little bit of power to keep the clock and lights on). In order to determine how much power your appliance actually uses during a whole period of time, you will need to multiply the number of kilowatts drawn by your appliance when turned on by the number of hours it has been used. This will measure the **energy **it has consumed during a period of time. This measurement is called a kilowatt-hour.