Pipe flow from velocity calculator
Convert pipe diameter and average velocity into flow.
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Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Flow rate
29.452L/min
Cross-sectional area0 m²
Calculated from your measurements.
How it's calculated
Flow = π × (internal diameter ÷ 2)² × average velocity. Convert cubic metres per second to the selected flow unit.
Calculations use consistent units for your selected measurements. Whole purchase quantities are rounded up.
What this estimate includes
For a full circular pipe. It does not calculate pressure loss, select pipe sizes or assess system compliance.
Quantity and arithmetic estimates only. Use project specifications for installation and design requirements.
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