Electricity Cost Calculator
What an appliance costs to run per day, month and year from its power and your tariff.
Inputs
Result
Enter your values to see the result.
How it works
Enter an appliance’s power in watts, how many hours a day it runs, the number of days and your price per kWh. Energy is power × time; cost is energy × price.
- kWh/day = watts × quantity × hours ÷ 1000
- cost = kWh × price per kWh
Assumptions
- A month is taken as 30 days and a year as 365 days. Real bills may add fixed fees and tiered tariffs.
Every calculation runs in your browser. Nothing you enter is uploaded.