—— Engineering Calculator

NPSH Available Calculator

Calculate Net Positive Suction Head Available (NPSHₐ) to confirm your pump installation will not cavitate. Results update in real time.

NPSHₐ Formula

NPSHₐ = ((Pₛᵤᵣ𝒻 − Pᵥₐₚₒᵤʳ) ÷ (ρ × g)) + Z − H_loss

Surface Pressure (absolute)

kPa

Standard atmosphere = 101.325 kPaVapour Pressure of Fluid

kPa

Water at 20°C = 2.34 kPaFluid Density

kg/m³

Water at 20°C = 998 kg/m³Elevation (liquid surface to pump centreline)

metres

Positive = liquid above pump. Negative = pump above liquidSuction Pipe Friction Loss

metres

Use the Pipe Friction Calculator if unknown

NPSH Available (NPSHₐ)

---metres

Pump NPSH Required (NPSHᵣ)

metres

Calculate suction pipe friction loss ->

Related Resources

Pipe Friction Calculator Installation Guide Troubleshooting Guide All Resources

These tools provide engineering guidance only. Final pump selection should be confirmed with Shubham Industries based on actual duty conditions and site details.