Broad Crested Weir Calculator
Estimate the discharge using: $$ Q = \frac{2}{3}\, L\, \sqrt{2g}\, h^{3/2} $$
* Enter the weir crest length and head in millimeters (mm). They will be converted to meters. The result is displayed in cubic meters per second (m³/s).
Step 1: Enter Parameters
e.g., 1000 mm (1 m)
e.g., 50 mm (0.05 m)