Free UK energy tool
Appliance electricity cost calculator
Enter three numbers to see what an appliance may cost each day, month and year. No account and no technical knowledge needed.
Appliance running cost
What does this appliance cost to run?
Estimated annual cost
£91.25
Energy per day
1.00 kWh
Daily cost
£0.25
Monthly cost
£7.50
Think of watts as how fast water leaves a tap. A kWh is how much “water” was used over time. This is an estimate, not a bill guarantee.
The tiny answer
Watts tell you how quickly an appliance uses electricity. Hours tell you how long it runs. Your price per kWh tells you what that energy costs.
Worked example
A 1,000W appliance used for 2 hours uses 2kWh. At an example rate of 25p per kWh, that is about 50p for the day.
Use the unit price shown on your own tariff for a more relevant estimate.
Questions people ask
How do I calculate an appliance electricity cost?
Divide watts by 1,000, multiply by hours used, then multiply the result by your electricity price per kWh.
Is the result the same as my electricity bill?
No. It is an estimate based on the numbers you enter. Real use can change as appliances cycle on and off.
What is a kWh?
A kilowatt-hour is an amount of energy. A 1,000 watt appliance running for one hour uses 1 kWh.