Hydraulic Pump Output Capacity Calculator

Hydraulic pump output capacity refers to the volume of fluid that a pump can move in a given period. It's a critical aspect of designing and operating hydraulic systems, which are a common part of industrial machinery, automotive applications, and many other technologies. This tutorial provides a detailed guide on calculating hydraulic pump output capacity based on the cylinder's area, the piston stroke, and the required time for a full stroke.

Hydraulic Pump Output Capacity Calculator
Hydraulic Pump Output Capacity Calculator Results
Hydraulic Pump Output Capacity (Q) = gpm

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Example Formula

The formula for calculating the hydraulic pump output capacity (Q) in gallons per minute (GPM) is as follows:

Q = (A × S × N) / (231 × T)


  1. Q: Hydraulic pump output capacity (GPM).
  2. A: The area of the cylinder (in2), calculated as π × r2 where r is the radius of the cylinder.
  3. S: The stroke length of the piston (inches).
  4. N: The number of strokes per minute.
  5. T: Time for full stroke (minutes).
  6. 231 is a conversion factor for transforming cubic inches to gallons.

Who wrote/refined the formula

This formula is a direct application of basic principles in fluid mechanics and physics. It was not developed by a specific individual but rather is the result of centuries of work in these fields. Understanding the hydraulic pump's output capacity is crucial across many industries, including but not limited to mechanical and civil engineering, automotive, and aeronautics.

Real Life Application

In the real world, hydraulic systems are used in a variety of machines and technologies. For instance, a mechanical engineer designing a hydraulic press would use this formula to ensure that the hydraulic pump chosen could provide the necessary output to operate the press efficiently and safely.

Key individuals in the discipline

Blaise Pascal, a French mathematician, and physicist, is a key figure in fluid mechanics. His work, known as Pascal's Law, is the foundation of hydraulic systems. Daniel Bernoulli, another notable physicist and mathematician, contributed to our understanding of fluid behavior with Bernoulli's Principle.

Interesting Facts

  1. Hydraulic systems date back to ancient times, with the Egyptians and Greeks using these principles for irrigation systems.
  2. Joseph Bramah, a British engineer, patented the hydraulic press in the late 18th century, leading to significant advancements in manufacturing and engineering.
  3. The concepts of hydraulics have transformed various industries, from construction and manufacturing to aerospace and automotive industries. These systems are essential for operating everything from car brakes and airplane control systems to excavators and lifts.


Understanding the calculation of hydraulic pump output capacity is crucial for the proper design and operation of many technologies that use hydraulic systems.

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