How much does an appliance cost to run?

It depends on the wattage, how long you use it, and your electricity rate. For example, a 100W lightbulb running 8 hours a day at 24.5p/kWh costs about 19.6p per day (£71.54/year).

How do I calculate electricity cost from watts?

Divide the wattage by 1,000 to get kW. Multiply by hours used to get kWh. Multiply by your electricity rate (in pence per kWh) to get the cost in pence.

What does kWh mean on my bill?

kWh stands for kilowatt-hour. It is the standard unit of energy your supplier charges for. One kWh is the energy used by a 1,000W appliance running for one hour.

Electricity Cost Calculator

Electricity cost = (Wattage ÷ 1,000) × Hours used × Electricity rate per kWh. A 2,000W appliance running for 1 hour at 24.5p/kWh costs about 49p.

What this calculator does

This calculator converts an appliance’s wattage into kWh energy usage, then multiplies by your electricity unit rate to show the running cost across different time periods.

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