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Cylinder Pressure (PSI) = Force (pounds)/Area (sq. Inch)	PSI = F/A
Cylinder Area (sq. inch) = 3.1416 x Radius Squared	A = 3.1416 x R(sq.)
Cylinder Force (pounds) = Pressure (PSI) x Area (sq. inch)	F = P x A
Cylinder Speed (ft./sec.) V = (231 x gpm) / (12 x 60 x Area)	V = (0.3208 x GPM) / A
Cylinder Volume, Gallons (Vol) = (Area x Stroke in inches) / 231	Vol. = (A x Stroke) / 231
Fluid Motor Torque (in. lbs.) T = Pressure (psi) x disp. (cu. in. / rev.) / 6.2822	T = (PSI x disp.) / 6.2822
Fluid Motor Speed (RPM) = (231 x GPM) / disp. (cu. in.)	RPM = (231 x GPM) / disp.
Fluid Motor Horsepower = Torque (in. lbs.) x RPM / 63025	HP = T x RPM / 63025
Pump Output Flow (GPM) = ((RPM) x disp. (cu. in.)) / 231	GPM = RPM / disp./231
Pump Input Horsepower = GPM x Pressure (psi) / 1714 x eff.	HP = (Q x P) / 1714 x E
Pump Input Torque (T) = (GPM x PSI x 3.06) / RPM /eff	T = (GPM x PSI x 3.06) / RPM / eff
Pump Displacement Cu. In. (Disp.) = GPM x 231) / RPM /eff	Disp. = (GPM x 231) / RPM / eff
Pump Input Speed ( RPM) = (GPM x 231) / Disp. / eff	RPM = (GPM x 231) / Disp. / eff
Pump Efficiency (eff) = Actual Flow (GPM) / Theoretical Flow (GPM)	eff = Actual GPM / Ther GPM
Pump Flow with PTO Drive (GPM) = (Engine RPM x % PTO x Disp. x eff) / 231	GPM = (Eng. RPM x % PTO x Disp. x eff) / 231
Velocity of Oil Flow in Pipe (Vel) = GPM x 0.3208 / Area	Vel = (GPM x 0.3208) / Area
Recommended Maximum Oil Velocity in Hydraulic Lines, FPS = Feet per Second	Pump Suction: 2-4 FPS Pressure Lines to 3000 PSI: 15-20 FPS Pressure Lines over 3000 PSI: 25 FPS