This electricity cost calculator finds what an appliance costs to run from its power draw, the hours used, and your electricity rate. Enter the values above.
Formula
Cost = Power(kW) × Hours × Rate per kWh
Example
1,500 W (1.5 kW) for 5 hours at $0.15/kWh: cost = 1.5 × 5 × 0.15 = $1.13/day.
Multiply by 30 for a monthly estimate. Convert watts to kilowatts by dividing by 1,000.
Frequently Asked Questions
How do I calculate electricity cost?
Multiply the power in kilowatts by the hours used and your rate per kWh. A 1.5 kW heater for 5 hours at $0.15 costs about $1.13.
How do I convert watts to kWh?
Divide watts by 1,000 for kilowatts, then multiply by hours to get kilowatt-hours.
What is a typical electricity rate?
It varies widely by region; check your utility bill for your exact rate per kWh.