# NPSHA Calculator

Online NPSHA calculator to calculate Net Positive Suction Head Available (NPSHA). It is defined as the absolute pressure at the suction port of the pump. NPSHA is a measure that corresponds to the level of pressure at the pump suction. The higher the pressure, the higher the NPSHA, will result in the better pump that operates well. Enter the atmospheric pressure, vapour pressure, density and gage pressure in this Net Positive Suction Head Available calculator to find the NPSH available.

## Net Positive Suction Head Available Calculator

Online NPSHA calculator to calculate Net Positive Suction Head Available (NPSHA). It is defined as the absolute pressure at the suction port of the pump. NPSHA is a measure that corresponds to the level of pressure at the pump suction. The higher the pressure, the higher the NPSHA, will result in the better pump that operates well. Enter the atmospheric pressure, vapour pressure, density and gage pressure in this Net Positive Suction Head Available calculator to find the NPSH available.

Code to add this calci to your website

#### Formula:

NPSH_{a} = (P_{a}-P_{v}+P_{n})/ρ
**Where,**
NPSH_{a} = NPSH Available
P_{a} = Atmospheric Pressure
P_{v} = Vapor Pressure
P_{n} = Gage Pressure at the Pump Suction
ρ = Density
### Example:

Calculate NPSHA for atmospheric pressure produced in pump of 8, vapour pressure of 9, gage pressure of 7 and density of 12 kg/m^{3}.

#### Solution:

Net Positive Suction Head Available = (8 - 9 + 7) / 12

=0.5