What is a kilowatt-hour (kWh)?

A kilowatt-hour (kWh) is a unit of energy that represents the consumption of one kilowatt (kW) of power over a duration of one hour. In simpler terms, if you were to run an appliance that requires one kilowatt of power continuously for one hour, it would use one kilowatt-hour of energy.

The concept of a kilowatt-hour can be better understood by breaking down its components:

Kilowatt (kW): A kilowatt is a measure of power, indicating the rate at which energy is used or produced. It’s equivalent to 1,000 watts. For instance, a 1kW heater uses energy at a rate of 1,000 watts when it’s on.

Hour: This represents the duration or the amount of time the power is consumed or produced.

When you multiply the power (in kW) by the time (in hours), you get the total energy consumed or produced, which is measured in kilowatt-hours (kWh).

What is the difference between a kilowatt hour (kWh) and a kilowatt (KW)?

Why Distinguishing Between kW and kWh Matters

What Can 1 Kilowatt-Hour Power?

How do I calculate what 1kWh will power?

What factors influence kWh consumption in UK homes?

What is the average kWh consumption in UK homes?

What is the average energy price per kWh?

What are other measures of electricity?

How are Megawatts and Gigawatts significant in the UK Energy Sector?

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Chris Richards

Chris is a personal finance specialist who founded Council Tax Advisors in 2012, assisting over 250,000 people with their Council Tax debt. Observing that many clients overpaid on utilities, he launched Utility Saving Expert in 2014, an energy price comparison site. In 2016, the platform expanded its services to include consumer and business insurance comparisons. Utility Saving Expert stands out with its commitment to social responsibility, donating 10% of net profits to fuel poverty charities, underscoring its dedication to both client value and community support.