Energy Savings Calculator
Enter old and new appliance wattage, daily usage, and your electricity rate to see annual savings and how long before the upgrade pays for itself.
Use the Energy Savings Calculator
Appliance Details
Current or old unit wattage
Replacement or upgraded unit wattage
US average ~$0.16/kWh
Leave blank to skip payback period
Enter appliance details and click Calculate Savings
Annual Electricity Savings
$0.00
Monthly Savings
$0.00
Payback Period
—
Old Annual Cost
$0.00
New Annual Cost
$0.00
Cumulative Savings Over Time
Wattage Comparison
Summary
This calculator compares the electricity consumption of an old appliance against a more efficient replacement. Enter both wattages, daily run time, and your electricity rate to see annual cost savings in dollars. Add the purchase price of the new unit to compute the simple payback period — the number of years before energy savings cover the upfront cost.
How it works
- Enter the wattage of your old appliance (check the label or manual).
- Enter the wattage of the new, more efficient replacement.
- Set how many hours per day the appliance runs.
- Enter your electricity rate in dollars per kWh (check your utility bill).
- Optionally enter the cost of the new appliance to see the payback period.
- Read the annual savings and payback period instantly.
Use cases
- Decide whether upgrading to an Energy Star refrigerator or AC is worth the upfront cost.
- Estimate savings from switching from incandescent bulbs to LED lighting.
- Compare two HVAC units with different efficiency ratings before buying.
- Calculate how long an efficient water heater or dehumidifier takes to pay off.
- Justify energy-efficiency investments to landlords or property managers.
- Track cumulative savings over 5 or 10 years.