Appliance Running Cost Calculator
Estimate the monthly and yearly electricity cost of any household appliance.
Enter your values and press Calculate.
Tip: country presets are starting points only. Replace rates and prices with your actual figures whenever possible.
How this calculator works
Watts are converted to kilowatts, then multiplied by hours of use and days used. Energy consumption is multiplied by the electricity price.
Formula
A 1,000-watt appliance used 2 hours per day for 30 days consumes about 60 kWh per month.
Getting a more accurate result
- Measured wattage is better than nameplate maximum wattage for cycling appliances.
- For refrigerators or inverter devices, use average measured consumption if available.
- Update your electricity rate after tariff changes.
Understanding your result
The result is intended for comparison and planning. Real-world costs can differ because of local taxes, fees, tariffs, financing, usage patterns, equipment efficiency, rounding and other conditions. For important decisions, verify the inputs against your bill, contract, lender, employer or other authoritative source.
Frequently asked questions
Can I calculate standby power?
Yes. Enter the standby wattage and the number of hours it remains in standby.
What if an appliance cycles on and off?
Use its measured average power or reduce effective daily hours to approximate duty cycle.
Is 1,000 watts equal to 1 kW?
Yes.
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Updated for CostMeter V1.2 • September 2026