Pump Capacity Calculator

Pump Capacity Calculator

What is Pump Capacity

Pump capacity, also known as flow rate or volume flow rate, is the volume of fluid that a pump is able to move per unit of time. It is typically measured in units of volume per time, such as gallons per minute (GPM) or liters per second (L/s).

There are several factors that can affect the capacity of a pump, including the size and design of the pump, the type, and viscosity of the fluid being pumped, and the pressure at which the pump is operating.

Pump Capacity Calculation Formula

To calculate the pump capacity, you will need to know the following information:

  • The speed of the pump (in revolutions per minute or RPM)
  • The displacement of the pump (in cubic inches or cm^3)
  • The efficiency of the pump

With this information, you can use the following formula to calculate the pump capacity:

Capacity (gpm) = (Displacement (in^3/rev) * RPM) / (231 * Efficiency)

For example, if a pump has a displacement of 0.05 cubic inches (0.82 ml) per revolution, is running at 1200 RPM, and has an efficiency of 70%, the capacity would be:

Capacity (gpm) = (0.05 in^3/rev * 1200 RPM) / (231 * 0.7) = 12 gpm

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