Updated June 29, 2026
Electricity Bill Calculator
Estimate electricity bill impact from watts, hours used, days per week, and price per kWh for one appliance or a combined load.
Live calculator
Calculate your actual running cost
Running this electricity bill for 10 hours a day, 7 days a week uses about 303.3 kWh each month.
Quick answer
How much does an electricity bill cost to run?
A 1,000 W electricity bill used for 10 hours a day, 7 days a week, consumes about 303.3 kWh per month. At $0.30 per kWh, that is approximately $91.00 per month. Replace these example figures with the wattage and electricity rate from your appliance and bill.
What changes the real running cost?
A bill estimate is easiest when every device is converted into kWh. Add appliance kWh together, then multiply by the electricity price per kWh on your tariff.
For a whole-home estimate, enter the average combined load in watts or use the calculator repeatedly for major appliances and add the monthly kWh totals.
Assumptions used in this example
This page starts with 1,000 watts, 10 hours of use per day, and 7 days per week. Those defaults are only a practical starting point. Replace them with the number on your product label, energy label, smart plug, or electricity bill.
Example electricity bill costs
These examples use 1,000 W for 10 hours a day and 7 days per week.
| Electricity rate | Per hour | Per month | Per year |
|---|---|---|---|
| $0.15 / kWh | $0.15 | $45.50 | $546.00 |
| $0.25 / kWh | $0.25 | $75.83 | $910.00 |
| $0.35 / kWh | $0.35 | $106.17 | $1274.00 |
Ways to reduce the cost
Start with changes that reduce active runtime without compromising safety or the job the appliance needs to do.
- Start with the biggest loads first.
- Use actual kWh readings when available.
- Separate standing charges from usage charges on your bill.
Estimate only. Actual consumption varies by model, setting, condition, temperature, duty cycle, and tariff. Use a plug-in meter or energy-label figure when accuracy matters.
FAQ
Electricity bill running cost questions
How do I calculate electricity bill running cost?
Divide the watts by 1,000 to get kilowatts, multiply by the hours used, then multiply by your electricity price per kWh. This page pre-fills 1,000 W, 10 hours per day, and 7 days per week as a starting example.
How much does an electricity bill cost per hour?
At 1,000 W and $0.30 per kWh, the example cost is about $0.30 per hour while it is actively using that power. Change the rate field to match your own bill.
Why might my real electricity bill cost be different?
For a whole-home estimate, enter the average combined load in watts or use the calculator repeatedly for major appliances and add the monthly kWh totals.
Should I use rated watts or measured watts?
Rated watts are useful for a quick estimate, but measured wall power or an energy-label kWh figure is usually more accurate because many appliances cycle on and off or change power during use.
Does the calculator include standing charges, taxes, or demand charges?
No. The calculator estimates usage cost from kWh only. If your bill includes standing charges, taxes, delivery fees, or demand charges, add those separately.
Can I share my result?
Yes. Use the share or copy button after entering your wattage, hours, days, rate, and currency. The page stores those inputs in the URL so you can revisit the same estimate.