Flow Rate Calculator

Volumetric flow from pipe size and velocity, or volume and time.

Runs in your browser — nothing is uploaded
From

—

How to use Flow Rate Calculator

  1. Choose what to solve for (where offered).
  2. Enter the known values in SI units shown next to each field.
  3. Read the answer with conversions to common units.

Formula & assumptions

Q = A × v = π(d/2)² × v