Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Total head, abbreviated as $$h_t$$, is the sum of the discharge flange and the sum of the suction flange.

## Total Head formula

$$\large{ h_t = \frac{ 3960 \; WHP }{ Q } }$$
Units English Metric
$$\large{ h_t }$$ = total head or height $$\large{ft}$$ $$\large{m}$$
$$\large{ Q }$$ = flow rate discharge $$\large{\frac{ft^3}{sec}}$$  $$\large{\frac{m^3}{s}}$$
$$\large{ WHP }$$ = water horsepower $$\large{\frac{lbf-ft}{sec}}$$ $$\large{\frac{btu}{s}}$$
• 1 horsepower = 3960 gal/min/foot