L/D Varies with Pipe Diameter Calculator

Enter value and click on calculate. Result will be displayed.


fT = Turbulent Friction Factor
L = Length
D = Pipe Diameter
K = K Value

Turbulent Friction Factor:
Length:
m
Pipe Diameter:
mm
K value:

To calculate the L/D ratio (Length-to-Diameter ratio) for a pipe, you can use the formula:

Where:

  • is the length of the pipe.
  • is the diameter of the pipe.

If you're specifically asking about how the L/D ratio varies with different pipe diameters, then you'll simply adjust in the formula. The L/D ratio will be directly proportional to the length of the pipe and inversely proportional to the diameter.

For example:

  • If the length of the pipe is 10 meters and the diameter is 2 meters, the L/D ratio would be:
  • If the diameter changes to 4 meters, with the length still being 10 meters:

So, as the diameter increases, the L/D ratio decreases, assuming the length stays the same.