Nozzle size calculator
Nozzle number from your rated PSI and GPM, rounded to standard sizes, including the per-tip size for surface-cleaner bars.
Pressure washer calculators
Work out nozzle and surface cleaner sizes from your washer's rating. Each calculator shows its formula and sources.
Surface cleaner size by GPM
What size surface cleaner your machine can drive, with manufacturer, distributor and rule-of-thumb guidance side by side.
Use the rated figures from your washer’s manual, not a marketing “max PSI”.