Water Flow Calculator

Convert pipe diameter and velocity into flow values, plus pressure equivalents.

Compute flow rate and pressure equivalents from pipe diameter, velocity, and pressure.

Pipe inner diameter (mm)Flow velocity (m/s)Pressure (bar)

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What does it do?

It computes pipe cross-section and derives flow from velocity.

Pressure is shown as kPa and water head equivalents.

Useful for quick checks in plumbing and pump pre-sizing.

Final engineering design should include line-loss calculations.