An airplane wing stays up because air rushing faster over the curved top pushes down less than the slower air under the flat bottom. That trade — speed up, pressure down — is Bernoulli's principle, and it governs far more than wings. Perfume atomizers, carburetors, shower curtains that billow inward, and the curveball's wicked break all run on the same deal.

The full Bernoulli equation says the total energy along a streamline stays constant: static pressure plus dynamic pressure plus elevation pressure never changes. In symbols: P + ½ρv² + ρgh = constant. The ½ρv² term is the dynamic pressure — the pressure equivalent of the fluid's motion — and it is the piece pilots and plumbers actually compute.

A private pilot checking true airspeed with a pitot tube is measuring dynamic pressure directly. A homeowner sizing a venturi pump for a pond is doing the same math in reverse. This calculator handles the key multiplication: type the dynamic-pressure factor (one-half times the fluid density) in the Variable A box, and the velocity squared in the Variable B box. The Result box returns the dynamic pressure — the number that tells you how much pressure speed is "spending" at that point in the flow.

With the pre-filled defaults — Variable A 10, Variable B 5 — the Bernoulli Calculator returns Result 50.0000. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.