Bernoulli equation
P/(rho g) + v^2/(2g) + z = constant
Fluid dynamics calculator
Bernoulli Equation Calculator
Calculate Bernoulli head terms and pressure difference for incompressible flow.
Calculator
Enter values
Choose units beside each input. Results update automatically.
Result
About this calculator
How it works
Bernoulli analysis compares pressure head, velocity head, and elevation head along a streamline for ideal incompressible flow.
Formulas
Formulas used
Pressure difference
P2 ideal = rho g (H1 - v2^2/(2g) - z2)
Guide
How to use this calculator
- Enter the known flow, geometry, or fluid property values.
- Select the units beside each input where a unit menu is shown.
- Read the highlighted result first, then use the table for supporting values.
Reference
What the results mean
Total head
Total mechanical energy per unit weight of fluid.
Pressure difference
How pressure changes between the two points for the entered velocities and elevations.
FAQ
Bernoulli Equation Calculator questions
Can I use different units?
Yes. Select the unit beside each input. The calculator converts values internally before solving.
Are these results suitable for final design?
Use results for education, screening, and early design checks. Verify final work against standards, codes, and project requirements.
Why do fluid results depend so much on assumptions?
Fluid calculations depend on geometry, roughness, density, viscosity, coefficients, and flow regime. Use representative input values and confirm assumptions.
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