Appliance Energy Calculator
Enter an appliance wattage, daily usage hours, and your electricity rate to see daily, monthly, and annual energy cost and kWh consumption.
Appliance Details
Check the label or manual
Average daily run time
From your utility bill
Energy & Cost Breakdown
| Period | kWh Used | Electricity Cost |
|---|---|---|
| Daily | — | — |
| Monthly (30 days) | — | — |
| Annual (365 days) | — | — |
Savings Comparison (optional)
Enter the wattage of a more efficient alternative to see how much you could save each year.
Annual Savings
—
Monthly Savings
—
kWh Saved / Year
—
Summary
Enter an appliance wattage, daily usage hours, and your electricity rate to see daily, monthly, and annual energy cost and kWh consumption.
How it works
- Enter the appliance wattage in watts (found on the label or in the manual).
- Set the number of hours per day the appliance typically runs.
- Enter your electricity rate in dollars per kWh (check your utility bill).
- The calculator computes kWh = (watts × hours) ÷ 1000 for each time period.
- Daily, monthly (30-day), and annual (365-day) cost and kWh figures update instantly.
- Use the comparison panel to see how it stacks up against a more efficient model.
Use cases
- Find out how much your air conditioner, refrigerator, or space heater costs to run each month.
- Compare the running cost of an old appliance versus a new energy-efficient model.
- Decide whether replacing an aging appliance will pay back its purchase price in energy savings.
- Estimate the electricity cost of a new appliance before buying it.
- Calculate the standby power cost of devices left plugged in around the clock.
- Break down energy expenses when budgeting for a new home or apartment.
Frequently Asked Questions
Last updated: 2026-06-11 ·
Reviewed by Nham Vu