Hydraulic Pump Calculator

Imperial

Horsepower Required to Drive a Pump
  • Gallons per minute (GPM)
  • Pounds/Sq Inch (PSI)

  • Horsepower

Example: How many horsepower are needed to drive a 5 gpm pump at 1500 psi?

Formula: GPM x PSI x .0007 = horsepower needed

 

Pump Output Flow (in Gallons per Minute)
  • Pump RPM
  • Pump Displacement (in3)

  • Output Flow

Example: How much oil will be produced by a 2.5 cubic inch pump operating at 1200 rpm?

Formula: RPM x Displacement ÷ 231 = gpm

 

Pump Displacement Needed for GPM of Output Flow
  • Gallons per Minute (GPM)
  • Revolutions per Minute (RPM)

  • Pump Displacement

Example: What displacement is needed to produce 5 GPM at 1500 RPM?

Formula: 231 x GPM ÷ RPM = in3 per revolution

 

This company assumes no liability for errors in data nor in safe and/or satisfactory operation of equipment designed from this information.

Metric

Kilowatt Required to Drive a Pump
  • Liters per minute (LPM)
  • Megapascal (MPa)

  • Kilowatt

Example: How many kilowatt are needed to drive a 5 LPM pump at 1500 MPa?

Formula: LPM x MPa x .02 = kilowatt needed

 

Pump Output Flow (in Liters per Minute)
  • Pump RPM
  • Pump Displacement (cm3)

  • Output Flow

Example: How much oil will be produced by a 2.5 cubic inch pump operating at 1200 rpm?

Formula: RPM x Displacement ÷ 1000 = LPM

 

Pump Displacement Needed for LPM of Output Flow
  • Liters per Minute (LPM)
  • Revolutions per Minute (RPM)

  • Pump Displacement

Example: What displacement is needed to produce 5 LPM at 1500 RPM?

Formula: 1000 x LPM ÷ RPM = cm3 per revolution

 

This company assumes no liability for errors in data nor in safe and/or satisfactory operation of equipment designed from this information.

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