COP and EER relationship calculator

Convert EER and COP using the electric-to-heat factor.

Units

\mathrm{COP} = \frac{\mathrm{EER}}{3.412}

Calculator

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

Given

\mathrm{COP} = \frac{12}{3.412} \approx 3.517

Symbol	Meaning	Unit
$\mathrm{COP}$	coefficient of performance	—
$\mathrm{EER}$	energy efficiency ratio	Btu/Wh

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

Symbol	Meaning	Unit
$\mathrm{COP}$	coefficient of performance	—
$\mathrm{COP}_{\text{SI}}$	energy efficiency ratio	—