Home Energy
AC Running Cost Calculator
Estimate the daily, monthly, and annual electricity cost of running an air conditioner.
Electricity Cost Calculator
Estimate how much an appliance costs to run from its power rating, daily usage, and your electricity rate.
Estimate household equipment energy consumption and cost with transparent daily, monthly, and annual figures.
Enter your details
Electricity usage details
Energy per dayEnergy per monthCost per dayCost per monthCost per year
Your estimate will appear here
Complete the fields and calculate to see a detailed result.
How to use this calculator
Enter rated power, choose watts or kilowatts, and provide expected daily hours. Use the energy rate from your bill and adjust active days when equipment does not run every day.
Formula and methodology
Watts are divided by 1,000. Daily energy is power in kW × hours; monthly energy multiplies by usage days. Costs multiply kWh by the USD rate, and annual cost assumes twelve matching months.
Worked example
A 1,500 W heater used four hours daily consumes 6 kWh per day and 180 kWh over 30 days. At $0.16 per kWh, cost is $0.96 daily, $28.80 monthly, and $345.60 yearly.
Assumptions and limitations
Rated power may differ from average demand. Thermostats, standby modes, seasonal use, tiered rates, taxes, and fixed charges can change bills. Treat this as a planning estimate.
Frequently asked questions
Where can I find appliance power?
Check the label, manual, specification sheet, or an electricity monitor.
Are taxes and fixed charges included?
No. The calculator estimates per-kWh energy charges only.
Why might actual use be lower?
Many appliances cycle or vary demand instead of drawing rated power continuously.
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