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Helpful Hydraulic Equipment Formulas
Use this online calculator to convert units of measure.
PTO OUTPUT SPEED - ENGINE SPEED
- PTO SPEED = ENGINE SPEED X PTO %
- PTO % = PTO SPEED / ENGINE SPEED
HP - SPEED - TORQUE
- TORQUE = HP X 5252 / RPM
- HP = TORQUE X RPM / 5252
- RPM = HP X 5252 / TORQUE
GPM - PSI - HP
- HP = GPM X PSI /1714
PUMP SELECTION - OUTPUT FLOW
- PUMP FLOW = (DISPLACEMENT X PUMP SHAFT SPEED X EFFICIENCY) / 231
- PUMP SIZE = (PUMP FLOW X 231) / (PUMP SHAFT SPEED X EFFICIENCY)
- 231 = cu. inches / gallon
- FLOW = SPEED
- PRESSURE = FORCE