Basic Hydraulic Formulas | Flodraulic Group
Basic Hydraulic Motor Calculations: Motor Torque (in lbs) = pressure (psi) x motor displacement (cu ins/rev) / (Can also use horsepower (hp) x 63,025 / speed (rpm) Motor Speed (rpm) = 231 x flow rate (gpm) / motor displacement (cu ins/rev) Motor Horsepower (hp) = torque (in lbs) x motor speed (rpm) / 63,025.