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Nozzle Size Calculator
Pressure WashingEnter your machine's rated GPM and desired operating PSI to find the correct nozzle orifice size. Using the wrong nozzle can cause equipment damage — an oversized nozzle drops pressure, while an undersized nozzle forces the unloader into bypass, overheating the pump.
Machine Specifications
Enter your pressure washer's rated output.
Gallons per minute from your machine's spec plate
Operating pressure you want at the nozzle
Recommended Nozzles
Best matches based on your specs.
Enter your specs and click calculate.
Why Nozzle Size Matters
Oversized Nozzle
Pressure drops below rated PSI. Cleaning performance suffers. Users blame the machine and file warranty claims.
Undersized Nozzle
Unloader valve stays in bypass. Pump manifold overheats. Seals and packings fail prematurely.