Pump NPSH Calculator

Calculate Net Positive Suction Head Available (NPSHa) and compare to required (NPSHr) for cavitation prevention.

Atmospheric pressure at pump location.
kPa
Vapor pressure of fluid at pump temp. Water@20°C: 2.34 kPa.
kPa
Height of liquid above pump centerline (negative if below).
m
Friction head loss in suction piping.
m
Water: 998, Fuel: 750 kg/m³.
kg/m³
From pump manufacturer curve.
m

Results

NPSH Available-m
NPSH Margin-m
Cavitation Assessment-
References: Hydraulic Institute Standards; ASME PTC 8.2