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Energy Savings Calculator

Annual Energy Savings / ROI Calculator
Enter Step 1. Calculate the total kilowatts saved by replacing the inefficient lamps with more efficient lamps
Enter Original Lamp Wattage    
Enter Replacement Lamp Wattage



Watts Saved per Lamp =

Enter Numbers of Lamps to replace



Total Watts Saved =

Total Kilowatts Saved =

Step 2. Calculate the total kWh per year saved by this upgrade
Total Kilowatts Saved    
Enter Hours Used per Day


Enter Days Used per Week


Enter Weeks Used per Year



Total kWh Saved per Year =

Step 3. Calculate the total energy costs saved per year by this upgrade
Total kWh Saved per Year    
Enter Your Energy Cost per kWh (typically $.10)



Total Energy Cost Savings per Year =

Step 4. Compute the payback of the upgrade
Enter Initial Cost of Lighting Upgrade


Total Energy Cost Savings per Year



# of Years for Payback on Investment =