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Nozzle Velocity Calculator — Pressure Drop to Jet Speed
Estimate ideal or coefficient-adjusted liquid jet velocity and volumetric flow from pressure drop, density and nozzle diameter.
Last updated: September 17, 2026
Results
Use non-negative ΔP and positive density, diameter and Cd
Formula, example and assumptions
v=Cd·sqrt(2ΔP/ρ); Q=Av.
Water through a 10 mm nozzle at 300 kPa differential and Cd=0.98 exits near 24 m/s.
- Incompressible Bernoulli conversion is used.
- Cd accounts approximately for contraction and losses; gas nozzles require compressible-flow treatment.
Frequently asked questions
What does this Nozzle Velocity Calculator solve?
Estimate ideal or coefficient-adjusted liquid jet velocity and volumetric flow from pressure drop, density and nozzle diameter.
Which units should I use?
Use the SI units shown beside each input. The results also expose practical converted outputs where useful.
Can I use this for final equipment selection?
Use it for transparent engineering estimates and cross-checks. Confirm fluid properties, manufacturer curves and applicable design codes before final selection.