Enter the water line radius (ft) and the water line length (ft) into the Calculator. The calculator will evaluate the Water Line Capacity. 

Water Line Capacity Formula

WLC = pi * r^2 * L


  • WLC is the Water Line Capacity (ft^3)
  • r is the water line radius (ft)
  • L is the water line length (ft)

To calculate Water Line Capacity, multiply the water line length by the water line radius squared, then multiply by pi.

How to Calculate Water Line Capacity?

The following steps outline how to calculate the Water Line Capacity.

  • First, determine the water line radius (ft). 
  • Next, determine the water line length (ft). 
  • Next, gather the formula from above = WLC = pi * r^2 * L.
  • Finally, calculate the Water Line Capacity.
  • 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.

water line radius (ft) = 0.75

water line length (ft) = 500