Simple Payback Calculator (Lighting)

Learn more about payback, and then use this calculator to determine how long it takes for an energy-efficient lighting measure to pay for itself.

All input must be numeric.

A.
units
B.
 $
 
Multiply A × B
$0.00
Total Cost
 
Watts
 
Watts
C.
Old wattage — new wattage ÷ 1000
0
kW saved
D.
units
E.
hours per day
F.
days per week
G.
weeks per year
H.
$
 
Multiply C through H
$0.00
Annual Savings
Simple payback = Total cost ÷ Annual savings
N/A
years