Electricity Cost Calculator
Find out exactly how much any appliance costs to run. Select an appliance, enter your usage hours and electricity rate, and get instant daily, monthly, and total cost breakdowns.
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Frequently Asked Questions
How do I find my electricity rate (tariff)?
Your electricity rate is printed on your monthly electricity bill, usually expressed as cents or dollars per kilowatt-hour (kWh). In the US the average is around $0.12–$0.16/kWh. In the UK it is around £0.28/kWh. Check your latest bill for the exact figure.
What does kWh mean?
kWh stands for kilowatt-hour. It is the standard unit of electrical energy. One kWh is the energy consumed by a 1000-watt (1 kW) appliance running for one hour. Your electricity bill charges you per kWh consumed.
How accurate are the wattage presets?
The preset wattages are typical average values for common household appliances. Actual consumption can vary based on brand, age, and usage patterns. For the most accurate result, check the label on the appliance or its manual for the rated wattage.
Can I calculate cost for multiple appliances at once?
Use the Quantity field to calculate the combined cost for several identical appliances (e.g., 5 LED bulbs all running the same hours). For different appliances, run the calculator separately and add the costs together.
How to Calculate Your Electricity Costs
Understanding your electricity usage is the first step to reducing your energy bills. Our electricity cost calculator uses the standard energy formula to give you accurate estimates for any appliance in your home or office.
The core formula is simple: Energy (kWh) = (Watts × Hours × Days) ÷ 1000. Multiply that by your local tariff (cost per kWh) and you get your exact electricity cost. For example, a 1500W air conditioner running 8 hours a day for 30 days at $0.12/kWh costs $43.20 per month.
Most electricity bills show your rate in cents or dollars per kilowatt-hour (kWh). In the US the average is around $0.12–$0.16/kWh, in the UK around £0.28/kWh, and rates vary widely across Asia, Europe, and Australia. Check your latest bill for the exact figure.
Running multiple appliances? Use the quantity field to multiply the wattage automatically. This is useful for calculating the cost of multiple light bulbs, a bank of computers, or several AC units running simultaneously.
Use the Month and Year preset buttons to quickly switch between a 30-day or 365-day calculation period, or enter any custom number of days to match your billing cycle.