ROI Calculator

A). Compute The total power (Kilowatts, KW) saved by upgrading older Bulbs to energy saving LED replacements
Parameter Unit Numerical Value
Current Lamp Wattage: W
Overdrive Lamp Wattage W
Watts Saved W
Number of Lamps Bulbs Quantity
Total Watts Saved W
Total KiloWatts Saved KW
B). Compute the total energy (kilowatt hours, kWh) saved annually by performing this upgrade
Parameter Unit Numerical Value
Total KiloWatts Saved KW
Hours of Use per Day hrs/day
Days of Use per Week day/week
Week of Use per Year wks/y
Total KWH Saved per Year KWH/yr
C). Compute the total energy cost saving per year
Parameter Unit Numerical Value
Total KWH Saved per Year KWH/yr
Your Energy Cost per KWH INR/KWH
Total Energy Cost Savings Per Year INR/yr
D). Compute the lifetime energy cost savings
Parameter Unit Numerical Value
Replacement Bulb Life hours
Hours per Year Usages hr/yr
Total Energy Cost Savings Per Year INR/yr
Lifetime Energy Cost Savings INR
Parameter Unit Numerical Value
Replacement Bulb Unite Price INR/pcs
Initial Cost of LED Light Bulb INR
Total Energy Cost Savings per Year INR/yr
Simple Payback on Energy Consumption Years
Return on Investment(ROI) %
E). Compute the lifetime labor/inventory/acquistion costs savings from upgrading to longer life LED replacements
Parameter Unit Numerical Value
Replacement Bulb Life hours
Original Bulb Life hours
Labor Cost to Change Original Bulb INR
Cost of Original Bulb INR
How many Bulbs to Replace Bulbs Quantity
Cost to Install Replacement LED Bulb INR
Total Lifetime Bulb Changing Cost Savings INR
F). Compute the amortized bulb changing cost savings per year
Parameter Unit Numerical Value
Total Lifetime of Replacement Cost Savings INR
Total Lifetime of Replacement Bulb Years
Total Amortized Replacement Cost Savings Per Year INR
Parameter Unit Numerical Value
Simple Payback on Energy Consumption Plus Replacement Costs Years
Initial Cost of Lighting Upgrade Per Bulbs INR
Total Energy + Replacement Cost Savings per year INR
Return on Investment (ROI) %