Enter the pipe diameter (m), the operating head (m), and the head loss coefficient into the Siphon Flow Rate Calculator. The calculator will evaluate the Siphon Flow Rate.

## Siphon Flow Rate Formula

The following formula is used to calculate the Siphon Flow Rate.

**SF = pi/4 * D^2 * (2*g*h/HLC)^.5**

Variables:

- SF is the Siphon Flow Rate (m^3/s)
- D is the pipe diameter (m)
- h is the operating head (m)
- HLC is the head loss coefficient

## How to Calculate Siphon Flow Rate?

The following steps outline how to calculate the Siphon Flow Rate.

- First, determine the pipe diameter (m).
- Next, determine the operating head (m).
- Next, determine the head loss coefficient.
- Next, gather the formula from above = SF = pi/4 * D^2 * (2*g*h/HLC)^.5.
- Finally, calculate the Siphon Flow Rate.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

pipe diameter (m) = .25

operating head (m) = 6

head loss coefficient = 1.25

SF = pi/4 * D^2 * (2*g*h/HLC)^.5 =** ** ?