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Online Calculator
Pipe flow rate calculator
Enter diameter and speed to calculate Q = A × v.
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Frequently asked questions
What's the formula?
Q = A × v.
How is the area of a circular pipe calculated?
A = πd²/4.
What units are you returning?
m³/s, L/min, and m³/h.
Should I use the average speed?
Yes, the formula uses the average velocity across the cross-section.