Efficiency

Efficiency, abbreviated as \(\eta\) (Greek symbol eta), a dimensionless number, is expressed in percentage and always less than 100%.

 

Efficiency formulas

\(\large{ \eta =  \frac {E_o} {E_i} 100 \% }\)
\(\large{ \eta =  \frac {W_o} {W_i} 100 \% }\)

Where:

\(\large{ \eta }\)  (Greek symbol eta) = efficiency

\(\large{ E_i }\) = input energy

\(\large{ E_o }\) = output energy

\(\large{ W_i }\) = input work

\(\large{ W_o }\) = output work