Electricity Cost Calculator
See how much any appliance costs to run per day, month and year.
How to use the Electricity Cost Calculator
- Enter the appliance’s power rating in watts (check its label).
- Enter how many hours a day you use it.
- Enter your electricity price per kWh (on your bill).
- See the running cost per day, month and year.
Cost = (watts ÷ 1000) × hours × price per kWh
About the Electricity Cost Calculator
Electricity is billed by the kilowatt-hour (kWh) — using 1000 watts for one hour. This calculator turns any appliance’s wattage and daily use into a real running cost, so you can see exactly what your heater, AC, fridge or gaming PC adds to the bill.
The maths is simple: divide the wattage by 1000 to get kilowatts, multiply by the hours you use it, then multiply by your price per kWh. We scale that to daily, monthly and yearly costs so the impact is easy to grasp.
Use it to hunt down energy-hungry devices, compare an old appliance with an efficient replacement, or decide whether an always-on gadget is worth it. Small savings on high-use appliances add up fast over a year.
Frequently asked questions
Where do I find an appliance’s wattage?
Look on the rating label (often on the back or base) or in the manual. It’s shown in watts (W), or as volts × amps, which you multiply to get watts.
What is a kWh?
A kilowatt-hour is the energy used by a 1000-watt appliance running for one hour. Your bill charges a set price for each kWh you use.
Does this include standby power?
Only if you include standby hours. Many devices draw a few watts even when “off”, which you can add as extra hours at the low wattage.