Coefficient of performance (COP) calculator

COP is dimensionless because output and input use matching energy units.

Units

\mathrm{COP} = \frac{Q_{\text{cooling}}}{E_{\text{input}}}

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{120{,}000}{35{,}000} \approx 3.429

Symbol	Meaning	Unit
$\mathrm{COP}$	cooling coefficient of performance	—
$Q_{\text{cooling}}$	cooling energy using consistent units	Btu
$E_{\text{input}}$	input energy using consistent units	Btu

Symbol	Meaning	Unit
$\mathrm{COP}$	cooling coefficient of performance	—
$Q_{\text{cooling}}$	cooling energy using consistent units	kWh
$E_{\text{input}}$	input energy using consistent units	kWh

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