Motor project ROR calculator

The rate of return makes present savings equal installed investment.

{\Delta C_{\text{initial}}} = \frac{S_{\text{annual}} \times \left[1 - \left(1 + i\right)^{-n}\right]}{i}

Calculator

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

Given

{\Delta C_{\text{initial}}} = \frac{3400 \times \left[1 - \left(1 + 0.07\right)^{-10}\right]}{0.07} \approx 23{,}880

Symbol	Meaning	Unit
${\Delta C_{\text{initial}}}$	incremental initial investment	$
$S_{\text{annual}}$	annual net savings	$/yr
$i$	rate of return	1/yr
$n$	project life	yr

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