Annual lighting energy savings calculator

Multiply power reduction by matching operating hours.

\Delta E = \Delta \mathrm{kW} \times H

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

\Delta E = 100 \times 4000 = 400{,}000

Symbol	Meaning	Unit
$\Delta E$	annual energy saved	kWh/yr
$\Delta \mathrm{kW}$	power reduction during operation	kW
$H$	annual operating hours	h/yr

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.