Differential Flowmeter
Compute volumetric flow rate and velocity for orifice/Venturi/Pitot differential-pressure flowmeters from Bernoulli's equation.
Inputs
Formula
A = πd²/4; Q = Cd·A·√(2Δp/ρ); v = Q/A
How to use
- Fill in Orifice dia. d, Pressure diff. Δp, Fluid density ρ, Discharge coeff. Cd in the Inputs section (watch the unit on each field).
- Click Calculate; the tool evaluates the formula shown above.
- Read Vol. flow Q, Velocity v in the results area.
Formula notesOrifice/nozzle flow Q = C_d·A₂·√(2·Δp/ρ); C_d discharge coeff, Δp pressure drop, ρ density.