# Water Horsepower

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Water Horsepower formula

$$\large{ WHP = \frac{ Q \; h_t }{3960} }$$
Units English Metric
$$\large{ WHP }$$ = water horsepower $$\large{\frac{lbf-ft}{sec}}$$ $$\large{\frac{Btu}{s}}$$
$$\large{ Q }$$ = flow rate discharge $$\large{\frac{ft^3}{sec}}$$ $$\large{\frac{m^3}{s}}$$
$$\large{ h_t }$$ = total head $$\large{ft}$$ $$\large{m}$$