Cavitation Number Calculator

Use one coherent SI unit system, physical state, geometry, and documented characteristic scale across every input. Both pressures are absolute and use one datum. Vapor pressure and density match the liquid temperature. Confirm whether each property belongs to the fluid, solid, interface, particle, or transported quantity named by the formula. Mixed conventions can produce a plausible number whose physical meaning is wrong.

The result is a pressure-margin ratio; it does not predict cavitation inception, damage, noise, or safe operation. A dimensionless group compares selected mechanisms under a stated model; it does not prove a regime, transition, instability, similarity, or safe design. Geometry, boundary conditions, property variation, measurement uncertainty, and the validity range of downstream correlations still require separate review.

No. This educational calculator performs displayed arithmetic on supplied SI values; it is not simulation, experimental validation, a correlation selector, material data, or engineering approval. Local pressure minima, nuclei, geometry, dissolved gas, transients, scale effects, and empirical inception criteria remain outside this ratio. Retain source values, units, property temperatures, geometry definitions, and uncertainty, then obtain qualified review before using the result for design or safety decisions.