Electricity Bill Calculator
Estimate your electricity costs based on appliance power, daily usage, number of days, and your energy rate.
Overview
This electricity bill calculator helps you estimate how much it may cost to run an appliance or device based on its power rating, daily usage time, number of days, and your electricity price per kWh. You can also include a daily standing charge for a more complete estimate.
How it works
The calculator converts the appliance power from watts to kilowatts, then multiplies it by daily usage hours to estimate daily energy use in kWh. That figure is multiplied by the number of days to get total energy use. The energy cost is then calculated using your electricity rate, and any optional standing charge is added to produce the total estimated bill.
How to use this calculator
- 1Enter the appliance power in watts.
- 2Add the average number of hours the appliance runs each day.
- 3Enter the number of days you want to estimate.
- 4Input your electricity rate per kWh.
- 5Turn on the standing charge option if needed and enter the daily charge.
- 6Review the estimated energy use and total cost.
Example Calculation
Appliance Power
2000
Hours Used Per Day
3
Number of Days
30
Electricity Rate
$0
Include Daily Standing Charge
true
Daily Standing Charge
$0
Estimated Total Cost
$63.90
A 2000 W appliance used for 3 hours a day over 30 days uses about 180 kWh. At 0.28 per kWh, the usage cost is about 50.40, and with a 0.45 daily standing charge the total estimated cost is about 63.90.
Frequently asked questions
What does this electricity bill calculator estimate?
It estimates electricity usage in kWh and the related cost based on power, usage hours, days, and your unit rate.
Do I enter watts or kilowatts?
Enter the appliance power in watts. The calculator converts it to kilowatts automatically.
What is a kWh?
A kilowatt-hour is a unit of energy. It shows how much electricity a device uses over time.
Should I include the standing charge?
Include it if you want a closer estimate of your bill and your tariff has a fixed daily charge.
Why might my real bill be different?
Your actual bill may vary because of changing usage, variable tariffs, taxes, meter accuracy, or appliances not always running at their rated power.
Can I use this for more than one appliance?
Yes. You can calculate each appliance separately and add the results, or use the combined power if they run for the same hours.
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Assumptions and warnings
Assumptions
- The calculator assumes the appliance runs for the same number of hours each day.
- Electricity rates and standing charges are assumed to stay constant during the selected period.
- Results are estimates and do not include tiered tariffs, time-of-use pricing, taxes, or discounts unless reflected in your rate.
- Power consumption is based on the entered appliance rating and may differ from real-world usage.