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Energy Consumption Calculator
Find out what an appliance really costs to run.
Consumption (kWh) = power (W) × hours/day × days / 1000. Multiply by your electricity price per kWh to get the cost.
How it works
Consumption (kWh) = power (W) × hours/day × days / 1000. Multiply by your electricity price per kWh to get the cost.
Worked example
A 1000 W heater used 5 h/day for 30 days = 150 kWh. At 0.20 /kWh, that is 30.
Recommendations
- Standby electronics can be 10% of your bill
- Match the heater power to the room size
- Use a smart plug to measure real usage
Tips & advice
- Unplug chargers when not in use
- Run energy-hungry devices off-peak if possible
- Replace old appliances with energy-efficient ones
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Energy Consumption Calculator
Find out what an appliance really costs to run.
Use the calculatorInvoice Generator FAQs
Yes, all 20 home calculators are 100% free, private and run entirely in your browser. No account needed.
They use standard industry formulas. Always round up for materials and confirm with a professional for structural work.
The calculators use metric units (meters, liters, m³). Convert imperial measurements beforehand if needed.
No. Calculations happen instantly in your browser and nothing is sent to any server.
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