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Nozzle Sizing Tools & Charts

Pressure Washing Nozzle Size Calculator

Calculate Your Nozzle Size







Helpful Tips

  • Round down if the calculated size is within 0.05 of a standard size.
  • Nozzle sizes are standardized in 0.5 increments (e.g., 2.0, 2.5, 3.0).
  • Too small a nozzle = too much pressure = risk of damage.
  • Too large a nozzle = lower pressure, but safer for your equipment.
  • Match the nozzle angle to your task:
    • 0° (Red): Max pressure, for tough stains on concrete.
    • 15° (Yellow): Heavy-duty cleaning.
    • 25° (Green): General-purpose cleaning.
    • 40° (White): Gentle cleaning (cars, windows).
    • 65° (Black): Soap application, low pressure.

Misting Nozzle Size Chart

Nozzle Size Flow Operating Pressure Range (psi)
Orifice Flow rate 362 435 507 580 652 725 797 870 942 1015
0.15 mm
(0.006″)		 L/min 0.03 0.033 0.036 0.038 0.04 0.043 0.045 0.047 0.049 0.05
US gpm 0.008 0.009 0.009 0.01 0.011 0.011 0.012 0.012 0.013 0.013
0.20 mm
(0.008″)		 L/min 0.04 0.044 0.048 0.051 0.054 0.057 0.06 0.062 0.065 0.068
US gpm 0.011 0.012 0.013 0.013 0.014 0.015 0.016 0.017 0.017 0.018
0.30 mm
(0.012″)		 L/min 0.068 0.075 0.081 0.086 0.091 0.096 0.101 0.105 0.11 0.114
US gpm 0.018 0.02 0.021 0.023 0.024 0.025 0.027 0.028 0.029 0.03
0.40 mm
(0.016″)		 L/min 0.104 0.113 0.123 0.131 0.139 0.146 0.154 0.16 0.167 0.173
US gpm 0.027 0.03 0.032 0.035 0.037 0.039 0.041 0.042 0.044 0.046
0.50 mm
(0.020″)		 L/min 0.114 0.125 0.135 0.144 0.153 0.161 0.169 0.176 0.183 0.19
US gpm 0.03 0.033 0.036 0.038 0.04 0.043 0.045 0.047 0.048 0.05
0.60 mm
(0.024″)		 L/min 0.138 0.152 0.164 0.175 0.186 0.196 0.205 0.215 0.223 0.232
US gpm 0.037 0.04 0.043 0.046 0.049 0.052 0.054 0.057 0.059 0.061
0.80 mm
(0.032″)		 L/min 0.165 0.181 0.195 0.209 0.221 0.233 0.245 0.256 0.266 0.276
US gpm 0.044 0.048 0.052 0.055 0.058 0.062 0.065 0.068 0.07 0.073

Misting Nozzle Spray Angle

All nozzles were tested at 1,000 psi using water at 70℉ (21.1℃). The room humidity was between 40-50% during the tests. The patternation measurements were conducted using the SETscan OP600 patternator that can measure sprays up to a maximum diameter of 7″.

Orifice Contour based angle
0.10 / .004″ 19.90°
0.15 / .006″ 55.70°
0.20 / .008″ 72.50°
0.30 / .012″ 74.60°
0.40 / .016″ 82.00°
0.50 / .020″ 72.50°
0.60 / .024″ 91.00°
0.80 / .032″ 105.80°
1.00 / .040″ 106.90°
1.20 / .048″ 114.00°