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Calculators
Calculate how much electricity your household appliances cost to run per day, month, and year. Enter the wattage, usage hours, and unit rate to get instant cost breakdowns for any device.
Follow these simple steps to get instant, accurate results directly in your browser:
Type the device power rating in watts (W) or kilowatts (kW) found on the manufacturer label.
Input the average number of hours the appliance runs per day.
Input your utility rate per kilowatt-hour (e.g., $0.15/kWh) to view monthly and annual costs.
The Electricity Cost Calculator calculates the electric power consumption and operating expenses of household appliances, electronics, air conditioners, heaters, and computing hardware.
Electric utility companies bill customers based on kilowatt-hours (kWh) of energy consumed. The calculator converts appliance wattage ratings into kilowatt-hours based on daily hours of operation and multiplies by your regional utility electricity rate ($/kWh), generating accurate cost estimates per hour, per day, per month, and per year.
The calculator formats expenses in your active currency without unwanted foreign currency conversions. All calculations run client-side in your web browser.
Energy (kWh) = (Watts * Hours * Days) / 1000 | Total Cost = Energy (kWh) * Cost per kWhWattage is multiplied by operating hours and divided by 1,000 to convert to kilowatt-hours (kWh), then multiplied by the electricity tariff.
Space Heater = 1,500 Watts | Run Time = 8 Hours/Day | Electricity Rate = $0.16 per kWh Daily Consumption = (1500 * 8) / 1000 = 12 kWh per day Daily Cost = 12 * $0.16 = $1.92 per day Monthly Cost (30 days) = $1.92 * 30 = $57.60 per month.
Our calculation methodologies adhere to published guidelines from authoritative government agencies and standards bodies:
Includes quick-select power ratings for refrigerators, LED TVs, microwave ovens, and laptops.
Full breakdown of energy costs across short and long time horizons.
Displays costs cleanly in your active selected currency.
Calculations execute locally in your browser memory.
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