Irrigation in the Pacific Northwest

Pipeline Pressure Loss

The first form calculates the pressure or friction loss along a given length of pipeline with a specified inside diameter. The second form calculates the minimum pipe size to limit pressure loss to a specified value.

Additional friction pressure losses occur due to fittings. These losses in-effect add extra additional length to the total pipeline. Use this calculator to estimate how much additional length needs to be added to the overall pipe length below in order to estimate these additional losses. Learn more about the units used on this page.

Pressure/Friction Loss

Flow Rate In The Pipe:
Pipe Inside Diameter:
Pipe Length:
Pipe Material:
Pressure Loss:


Minimum Pipe Size

Flow Rate In The Pipe:
Pipe Length:
Pipe material
Maximum Allowable Pressure Loss:
Minimum Pipe Size:



The Equation

This claculator uses the Hazen-Williams equation to determine the pressure loss due to pipe friction.


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