Pa to Psi

Fluid Pressure Metrology & ISO 80000-4 Standards

The Pascal (symbol: Pa) is the SI derived unit of pressure. The Imperial unit is pounds per square inch (psi):

• 1 PSI (psi): 6,894.757293 Pa = 6.894757 kPa = 0.068948 bar = 27.6799 inWC = 51.7149 mmHg

• 1 Pascal (Pa): 0.000145038 psi = 0.001 kPa = 10^-5 bar = 0.004015 inWC

Primary Pressure Scale Benchmarks

• 100 Pa (HVAC Static Pressure): = 0.0145 psi = 0.401 inWC

• 2,500 Pa (Blower Door Test): = 0.3626 psi = 10.037 inWC

• 101,325 Pa (1.0 atm Sea Level): 14.6959 psi = 101.325 kPa = 1.01325 bar

• 220,000 Pa (Car Tire): = 31.908 psi = 220.0 kPa = 2.20 bar

• 600,000 Pa (Bicycle Tire): = 87.023 psi = 600.0 kPa = 6.00 bar

• 1,000,000 Pa (1.0 MPa Hydraulic): = 145.038 psi = 10.00 bar

Equations

• PSI (psi) = Pascals (Pa)6,894.757

• Pascals (Pa) = PSI (psi) × 6,894.757

How to Use This Calculator

Enter your Pressure Value to Convert (e.g. 101325.0), HVAC & Engineering Pressure Benchmark — choose from Custom Pressure Value, 100 Pa (0.0145 psi / 0.40 inWC / HVAC Air Duct), 2,500 Pa (0.363 psi / 10.0 inWC / Building Blower Door), and Conversion Direction — choose from Pascals to PSI (Pa → psi / divide by 6,894.76), PSI to Pascals (psi → Pa / multiply by 6,894.76). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 psi = 6,894.757293168361 Pa

Worked Example

A tire pressure gauge reading 32.0 psi corresponds to exactly 220,632 Pascals (or 220.6 kPa).

Understanding Your Result

Unit conversion precision: round to the same number of significant figures as your original measurement. Converting 6 feet to meters gives 1.8288 m — but if your measurement was approximate (±1 inch), expressing more than 2 decimal places is false precision. For international trade and technical specifications, SI units (meters, kilograms, liters) are the standard. US customary units (feet, pounds, gallons) differ from Imperial UK units: 1 US gallon = 3.785 L vs. 1 UK gallon = 4.546 L.