• Home
  • Learn with Bailey: Hydraulic Formulas


Hydraulic Formulas


Torque, HP, Speed Relations in Hydraulic Pumps & Motors


T = (HP x 5252) / RPM HP = (T x RPM) / 5252 RPM = (HP x 5252) / T


Definitions

T = Torque, foot-lbs

RPM = Speed, revs./minute

HP = Horsepower


Hydraulic Power Flowing Through the Pipes


HP = (PSI x GPM) / 1714


Definitions

HP = Horsepower

PSI = Gauge pressure, lbs/sq. inch

GPM = Flow, gallons per minute


Force Developed by an Air or Hydraulic Cylinder

F = A x PSI


Definitions

F = Force or thrust, lbs

A = Piston area, square inches

PSI = Gauge pressure, lbs/sq. inch


Inch & Millimeters (MM) Conversions


MM = inches x 25.4

Inches = MM x 0.03937