Electricity Calculator
Cost = Power(kW) × Hours/day × Days/month × Rate($/kWh)1.0×8×30×0.12=$28.80/month
Free online tool
Electricity Calculator
Enter the power rating, daily usage and electricity rate.
Instant calculation
Electricity Calculator
Enter the power rating, daily usage and electricity rate.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter power rating
Type the appliance power rating in watts.
- 02
Enter usage
Type hours used per day and days per month.
- 03
Enter electricity rate
Type your cost per kilowatt-hour.
The formula
How this calculation works
Converts watts to kilowatts, multiplies by usage hours and electricity rate.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
1000W appliance, 8 hrs/day, 30 days/month, $0.12/kWh — cost?
1.0×8×30×0.12=$28.80/month$28.80 per monthCommon questions
Questions about this calculation
What is the Electricity Calculator?
The Electricity Calculator helps you calculate electricity consumption and monthly cost for an appliance. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Converts watts to kilowatts, multiplies by usage hours and electricity rate.
Can you show an example?
Example: 1000W appliance, 8 hrs/day, 30 days/month, $0.12/kWh — cost? — $28.80 per month.
Is my data saved when I use the Electricity Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Electricity Calculator free to use?
Yes. The Electricity Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
Continue calculating