// multi-utility computation suite · offline · instant · precise
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eng.bernoulli-venturi Calculator
Calculates flow rate through a Venturi meter from the pressure differential, pipe and throat diameters, and fluid density. The Venturi meter has a discharge coefficient of 0.98–0.99 — significantly higher than orifice plates (0.6–0.7), making it more accurate at the cost of higher fabrication complexity.
Inputs
Diameter1 Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Diameter2 Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Pressure Diff Pa
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Fluid Density
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Results
throat velocity (m/s)
The value at the specified point or condition.
flow rate Q (L/s)
Flow rate Q — the volume of fluid passing a point per unit time.
flow rate (m³/h)
The value at the specified point or condition.
upstream velocity
Reference formula or conversion factor shown for context.