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What any appliance really costs per day, month, and year.
⚡ Find the wattage on the appliance label or its spec sheet. Heaters and dryers (1500-5000 W) dwarf laptops (≈50 W); the yearly line is where surprises live.
Cost = watts ÷ 1000 × hours × price per kWh. A 1500 W space heater running 4 hours at $0.15/kWh costs $0.90 per day — about $27 per month if used daily. Small numbers compound fast.
Your utility bill states price per kWh; include supply plus delivery charges for the true number (US average ≈ $0.17/kWh in 2024, EU typically €0.20–0.40).
Devices left plugged in draw 1–5 W continuously. Individually trivial, but a household of twenty such devices wastes $50–150 per year — the yearly row above makes such costs visible.
Anything that moves heat (heaters, dryers, water heaters, AC) is 10–100× a laptop’s draw. Prioritize efficiency there and small gadgets stop mattering.
Disclaimer: This calculator is for informational and educational purposes only and does not constitute financial, investment, or legal advice. Calculated results are estimates based on the inputs you provide; actual figures may vary. Always consult a qualified professional before making financial decisions.
The Electricity Cost Calculator lets you figure out electricity cost calculatorinstantly, without reaching for a spreadsheet or doing the math by hand. Whether you're planning a budget, checking a loan, or working through homework, the tool applies the correct formula behind the scenes and shows the result the moment you enter your numbers.
Unlike a static chart or table, this calculator adapts to your exact inputs. You can adjust any value and see the outcome update in real time, which makes it easy to compare scenarios — for example, "what if the rate were 1% lower?" or "what if I paid an extra $50 a month?"
Common uses: people reach for this tool when they need to find a how much does it cost to run a heater, tv power consumption per hour cost, air conditioner electricity cost calculator, or kwh price running cost estimator.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
The Electricity Cost Calculator is based on the following formula:
kWh = Watts ÷ 1000 × Hours Cost = kWh × Rate per kWh Monthly cost = Watts ÷ 1000 × Hours per day × 30 × Rate per kWh Yearly cost = Monthly cost × 12
Variables: Watts = Appliance power draw (W) Hours = Hours used per day kWh = Energy consumed (kilowatt-hours) Rate per kWh = Electricity price ($ per kWh; US average about $0.17) Cost per day, month, year = Running cost over each period ($)
A watt is a rate of energy use, so cost is power times hours, converted to kilowatt-hours and priced at your utility rate. The same three inputs scale the estimate to any day, month, or year.
Worked example: Step 1: A 1,500 W space heater runs 5 hours per day at $0.17 per kWh. Step 2: Energy = 1,500 ÷ 1000 × 5 = 7.5 kWh per day. Step 3: Daily cost = 7.5 × 0.17 = $1.275 ≈ $1.28. Step 4: Monthly = 1.275 × 30 = $38.25; yearly = 38.25 × 12 = $459.00. Result: the heater costs about $1.28 per day, $38.25 per month, and $459 per year to run.
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