Free Electricity Cost Calculator
Calculate the electricity cost of running an appliance based on its wattage, usage hours, and your utility rate.
W
hrs
USD/kWh
days
Monthly Cost
$25.20
Daily Cost$0.84
Annual Cost$306.60
Monthly kWh180.0 kWh
Monthly Cost vs Days Per Month
How to Calculate Electricity Cost
Convert wattage to kilowatts, multiply by usage hours to get kWh, then multiply by your utility rate.
Formula
Daily kWh = Wattage / 1000 x Hours Per Day
Daily Cost = kWh x Rate Per kWh
Example Calculation
A 1,500W space heater running 4 hours/day at $0.14/kWh.
- 01Daily kWh = 1,500 / 1,000 x 4 = 6.0 kWh
- 02Daily cost = 6.0 x $0.14 = $0.84
- 03Monthly cost = $0.84 x 30 = $25.20
- 04Annual cost = $0.84 x 365 = $306.60
Frequently Asked Questions
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