# Pump Cavitation Equations and Formulas Calculator

## Fluid Mechanics and Hydraulics

Solving for impeller inlet pressure

#### Inputs:

 net positive suction head (NPSH) meter attometer centimeter chain dekameter decimeter exameter femtometer foot gigameter hectometer inch kilometer light year link megameter micrometer micron mile millimeter nanometer petameter picometer rod terameter yard fluid velocity (V) meter/second centimeter/hour centimeter/second foot/day foot/second inch/hour inch/second kilometer/hour kilometer/second knot mach sea level 15 C meter/day mile/hour mile/second millimeter/second speed of light in vacuum yard/second liquid vapor pressure (pv) pascal atmosphere bar dyne/centimeter^2 foot of water inch of mercury inch of water kilonewton/meter^2 millibar millimeter of mercury newton/meter^2 pound/foot^2 pound/inch^2 torr acceleration of gravity (g) meter/second^2 centimeter/second^2 foot/second^2 inch/second^2 kilometer/second^2 mile/second^2 millimeter/second^2 yard/second^2 fluid specific weight (SW) newton/meter^3 pound/foot^3

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#### Conversions:

 NPSH = 0 = 0 meter V = 0 = 0 meter/second pv = 0 = 0 newton/meter^2 g = 0 = 0 meter/second^2 SW = 0 = 0 newton/meter^3

#### Solution:

 impeller inlet pressure (p) = HAS NOT BEEN CALCULATED

#### Other Units:

Change Equation
Select an equation to solve for a different unknown

Water Horsepower
 Solve for water horsepower Solve for flow rate or discharge Solve for total head Solve for pump efficiency Solve for brake horsepower

Net Positive Suction Head and Cavitation
 Solve for NPSH - net positive suction head Solve for fluid or liquid velocity Solve for pressure at impeller inlet Solve for fluid or liquid vapor pressure Solve for specific weight of fluid or liquid Solve for the acceleration of gravity

Where
 WHP = water horsepower Q = flow rate or discharge H = total head n = pump efficiency BHP = brake horsepower NPSH = net positive suction head V = velocity of fluid or liquid p = impeller inlet pressure pv = vapor pressure of fluid or liquid SW = specific weight of fluid or liquid g = acceleration of gravity

References - Books:

1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.

by Jimmy Raymond