Free Electricity Cost Calculator
This electricity cost calculator helps estimate how much an appliance or device costs to run. Enter the wattage, hours used per day and electricity price per kWh, and the tool will estimate daily, weekly, monthly and yearly running costs.
It is useful for heaters, fans, computers, TVs, lights, chargers, tumble dryers and any other gadget that quietly eats electricity while pretending to be innocent in the corner.
How To Use This Electricity Cost Calculator
Enter the appliance power rating, choose watts or kilowatts, add how many hours it runs per day and enter your electricity unit price per kWh. The calculator will estimate running costs over different time periods.
Electricity Cost Formula
Running cost is calculated by converting watts to kilowatts, multiplying by hours used, then multiplying by your electricity price per kWh.
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Electricity Cost Calculator FAQ
What is kWh?
A kilowatt-hour, or kWh, is a unit of energy. A 1,000 watt appliance running for one hour uses 1 kWh.
Where do I find my electricity price per kWh?
Your electricity price per kWh is usually shown on your energy bill or tariff details. Enter the price as a decimal, for example 0.27 for 27p per kWh.
Is this exact?
No. It is an estimate. Real usage can vary depending on appliance settings, standby power, thermostat cycling, efficiency and your actual tariff.