Example: Appliance power: 1,500 watts · Hours used per day: 3 hrs · Electricity rate: 0.15 $/kWh → Cost per month: $20.52.
Cost per day: $0.67
Cost per year: $246
kWh per month: 137
Frequently asked questions
How do I calculate electricity cost? Enter your numbers above and the result updates instantly. For example: Appliance power: 1,500 watts · Hours used per day: 3 hrs · Electricity rate: 0.15 $/kWh → Cost per month: $20.52.
Is this Electricity Cost Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for electricity cost. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.