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Pressure Washer PSI to Bar & Flow Converter
Compare US pressure washer specifications with UK and metric listings. Enter PSI or bar and US gallons per minute or litres per minute to see both sets of units instantly.
How do you convert pressure washer PSI to bar?
Divide PSI by 14.5037738 to get bar. For flow, multiply US gallons per minute by 3.785411784 to get litres per minute. These conversions help compare US and UK product listings, but they do not reveal a washer’s actual pressure or flow at the nozzle.
Pressure
103.42 bar
1500 PSI
Flow
5.68 L/min
1.50 US GPM
These are unit conversions, not measured output or a paint safety assessment. Use working measurements when you have them; advertised maximum PSI and flow may occur under different conditions.
Conversion formulas
Use bar = PSI ÷ 14.5037738 and L/min = US GPM × 3.785411784. A US gallon is 3.785411784 litres; an Imperial gallon is different. Product listings that say GPM without specifying the gallon standard need a manual or manufacturer check.
Example for a detailing washer
A stated 1,500 PSI converts to about 103.42 bar, and 1.5 US GPM converts to about 5.68 L/min. This is an arithmetic example, not a measured washer result. Compare working values where possible; maximum pressure and maximum flow may be advertised separately.
Choosing equipment for car paint
Pressure alone cannot establish paint safety. Spray angle, distance, nozzle condition, damaged paint, and actual working pressure matter. Use a wide fan tip, keep the wand moving, and follow the vehicle and equipment manuals. Our nozzle sizing calculator estimates orifice size from measured flow and a selected target pressure.
Sources and calculation status
The conversion constants follow the NIST Guide to the SI conversion factors. The result is a unit conversion, not a product test or manufacturer specification. Reviewed 28 September 2026.