Energy cost savings calculator

Converts saved kWh to energy-charge savings.

S_{\text{energy}} = \Delta E \times r_{e}

Calculator

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

Given

S_{\text{energy}} = 100 \times 0.12 = 12

Symbol	Meaning	Unit
$S_{\text{energy}}$	annual energy-charge savings	$/yr
$r_{e}$	electric energy rate	$/kWh
$\Delta E$	annual energy saved	kWh/yr

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