Friction Loss Calculator

Pressure Washing

Water flowing through a hose loses pressure due to friction against the hose walls. Longer runs and smaller diameters mean more loss. Know your terminal PSI before starting the job.

Hose Setup

Enter your machine specs and hose configuration.

Machine Rated PSI

Flow Rate (GPM)

Total Hose Length (feet)

Hose Internal Diameter

Results

Pressure at the end of your hose run.

Enter your setup and click calculate.