Electricity Cost Calculator
What any appliance costs to run per day, month and year.
Enter your values
Enter the appliance wattage in W.
Enter the hours used per day in hrs.
Enter the electricity rate in $/kWh.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Cost per day
- $0.96
- Cost per month
- $29.22
- Cost per year
- $350.4
- Energy per year
- 2190 kWh
- Cost per hour of use
- $0.24
Quick answer
Running cost is watts ÷ 1000 × hours × price per kWh.
Cost = (W ÷ 1000) × hours × rate
At a glance
| What it does | What any appliance costs to run per day, month and year. |
|---|---|
| Category | Home & DIY |
| Inputs needed | Appliance wattage, Hours used per day, Electricity rate |
| Main output | Cost per day |
| Formula | Cost = (W ÷ 1000) × hours × rate |
| Cost | Free — no sign-up, no download |
How to use the Electricity Cost Calculator
- 1Find the wattage on the appliance label.
- 2Estimate daily hours of use.
- 3Enter your electricity rate per kWh.
Inputs explained
- Appliance wattage(W)
- Enter the appliance wattage in W.
- Hours used per day(hrs)
- Enter the hours used per day in hrs.
- Electricity rate($/kWh)
- Enter the electricity rate in $/kWh.
Worked example
Using the values the calculator loads with:
Inputs
- Appliance wattage1500 W
- Hours used per day4 hrs
- Electricity rate0.16 $/kWh
Results
- Cost per day$0.96
- Cost per month$29.22
- Cost per year$350.4
- Energy per year2190 kWh
- Cost per hour of use$0.24
Frequently asked questions
What uses the most electricity at home?
Heating and cooling, then water heating, then the dryer and oven. Standby electronics are a small but constant drain.
How do I find my kWh rate?
It is printed on your utility bill — divide total charges by kWh used for the true all-in rate.
What do I need to enter into the Electricity Cost Calculator?
Just 3 values: appliance wattage, hours used per day, electricity rate. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Electricity Cost Calculator work out the answer?
Running cost is watts ÷ 1000 × hours × price per kWh. It applies the formula Cost = (W ÷ 1000) × hours × rate and shows the working so you can check each step by hand.
Is the Electricity Cost Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.