Enter the coefficient of discharge, the diameter (ft), and the height (ft) into the Riser Pipe Flow Calculator. The calculator will evaluate the Riser Pipe Flow. 

Riser Pipe Flow Formula

The following formula is used to calculate the Riser Pipe Flow. 

Q = 6.3*Cd*d^2*h^{.5}


  • Q is the Riser Pipe Flow (ft^3/min)
  • Cd is the coefficient of discharge 
  • d is the diameter (ft) 
  • h is the height (ft) 

How to Calculate Riser Pipe Flow?

The following steps outline how to calculate the Riser Pipe Flow.

  1. First, determine the coefficient of discharge.
  2. Next, determine the diameter (ft). 
  3. Next, determine the height (ft). 
  4. Next, gather the formula from above = Q = 6.3*Cd*d^2*h^.5.
  5. Finally, calculate the Riser Pipe Flow.
  6. 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.

coefficient of discharge = .59

diameter (ft) = .75

height (ft) = 30

Q = 6.3*Cd*d^2*h^.5 =  ?