Cavitation Number Calculator

Calculate the Cavitation Number using: $$ \sigma = \frac{P_\infty – P_v}{\tfrac{1}{2}\rho\,v^2} $$

* Enter the ambient pressure $P_\infty$ (Pa), vapor pressure $P_v$ (Pa), fluid density $\rho$ (kg/m³), and flow velocity $v$ (m/s).

Step 1: Enter Parameters

Ambient Pressure, $ P_\infty $ (Pa):

e.g., 101325 Pa (atmospheric pressure)

Vapor Pressure, $ P_v $ (Pa):

e.g., 2330 Pa (for water at 20°C)

Fluid Density, $ \rho $ (kg/m³):

e.g., 1000 kg/m³ for water

Flow Velocity, $ v $ (m/s):

e.g., 1 m/s

Calculated Cavitation Number