Electricity cost per appliance
Electricity cost per appliance: enter your values and get an instant free result.
Open calculatorCleverCalc · Guides
Calculate appliance electricity costs: watts, kWh and annual cost
What does a lamp, PC or refrigerator cost to run each year? Separate power in watts from energy in kWh and use your own electricity tariff. Compare appliances over the same usage period rather than judging them by wattage alone.
The right calculatorsHow to get started
- 01
Find the wattage and running time. For refrigerators, measured annual kWh or the energy-label figure is usually more useful than maximum power.
- 02
Use kWh = watts ÷ 1,000 × hours, then multiply by price per kWh. Use the variable unit price; a monthly standing charge does not automatically belong to one appliance.
- 03
Compare daily, monthly and annual costs using actual operating days. PCs at idle or under load, and air conditioning that cycles, need realistic average consumption.
The right calculators
Electricity cost calculator
Electricity cost calculator: enter your values and get an instant free result.
Open calculatorLED electricity cost calculator
Calculate the annual energy use and cost of your LED lights.
Open calculatorRefrigerator electricity cost calculator
Calculate the annual and monthly electricity cost of your refrigerator.
Open calculatorFreezer electricity cost calculator
Calculate the annual and monthly electricity cost of your freezer.
Open calculatorPC and gaming PC electricity cost calculator
PC and gaming PC electricity cost calculator: enter values and calculate the result instantly.
Open calculatorA worked example
Calculate appliance electricity costs: watts, kWh and annual cost
A device drawing a constant 100 W runs for 5 hours daily: 100 ÷ 1,000 × 5 = 0.5 kWh per day. At an illustrative €0.30/kWh, that costs €0.15 daily or €54.75 over 365 days. Watts measure power; kWh measure energy. The price is an example, not a current tariff.
Frequently asked questions
Can I multiply a refrigerator’s wattage by 24 hours?
Only if it really draws that power continuously. The compressor normally cycles on and off. Use annual energy consumption or a measurement over several representative days for a better estimate.
Is the result my complete electricity bill?
No. It estimates the entered energy at the price you supply. Standing charges, time-of-use or tiered tariffs and other appliances can change the actual bill.
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