Bernoulli Equation Calculator

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Calculates pressure, velocity, or height in a fluid flow system using the Bernoulli equation, based on the principle of conservation of energy.

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How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Pressure at Point 1, Velocity at Point 1, Height at Point 1, Density of the fluid, Pressure at Point 2, and Height at Point 2 in the units shown.

Step 2

Read Velocity at Point 2 in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Water Flow - Horizontal Pipe

Pressure at Point 1: 101,325 Pa; Velocity at Point 1: 2 m/s; Height at Point 1: 0 m; Density of the fluid: 1,000 kg/m³; Pressure at Point 2: 101,325 Pa; Height at Point 2: 0 m

Velocity at Point 2: 2 m/s

Water Flow - Pressure Increase

Pressure at Point 1: 101,325 Pa; Velocity at Point 1: 2 m/s; Height at Point 1: 0 m; Density of the fluid: 1,000 kg/m³; Pressure at Point 2: 102,000 Pa; Height at Point 2: 0 m

Velocity at Point 2: 1.62788206 m/s

Water Flow - Height Change

Pressure at Point 1: 101,325 Pa; Velocity at Point 1: 2 m/s; Height at Point 1: 1 m; Density of the fluid: 1,000 kg/m³; Pressure at Point 2: 101,325 Pa; Height at Point 2: 0 m

Velocity at Point 2: 4.860041152 m/s

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