Enter the vertical distance, horizontal distance, and constant head water into the calculator to determine the coefficient of velocity.

## Coefficient of Velocity Formula

The following equation is used to calculate the Coefficient of Velocity.

Cv = SQRT (x^2 / (4*y*h) )

• Where Cv is the coefficient of velocity
• x is the horizontal distance
• y is the vertical distance
• h is the head of water

## How to Calculate Coefficient of Velocity?

Example Problem:

The following example outlines the steps and information needed to calculate Coefficient of Velocity.

First, determine the horizontal distance . In this example, the horizontal distance is found to be 3ft.

Next, determine the vertical distance . For this problem, the vertical distance is found to be 2ft.

Next, determine the head of water . In this case, the head of water is measured to be 4ft.

Finally, calculate the Coefficient of Velocity using the formula above:

Cv = SQRT (x^2 / (4*y*h) )

Cv = SQRT (3^2 / (4*2*4) )

Cv = .530