kPa to psi Conversion

Tire & Industrial Pressure Conversion Engineering

Pounds per square inch (psi) is the dominant pressure unit in the United States and UK, whereas kilopascals (kPa) is the SI standard used across Canada, Europe, and Asia.

Core Pressure Conversion Equations

• kPa to psi: psi = kPa × 0.1450377377

• psi to kPa: kPa = psi × 6.894757293

• kPa to bar: bar = kPa × 0.01

• kPa to kg/cm²: kg/cm^2 = kPa × 0.0101971621

Common Automotive Tire Pressure Lookup Table (kPa to psi)

• 200 kPa = 29.01 psi

• 220 kPa = 31.91 psi

• 240 kPa = 34.81 psi

• 250 kPa = 36.26 psi

• 280 kPa = 40.61 psi

Industrial Pneumatic Application

In compressed air tools and industrial automation, air compressor gauges frequently feature dual-scale dials in both kPa and psi to prevent over-pressurization accidents.

Quick Mental Rule of Thumb

To approximate kPa to psi mentally, divide the kPa value by 7 (e.g., 220 ÷ 7 ≈ 31.4 psi, very close to the true value of 31.91 psi). Conversely, to convert psi to kPa mentally, multiply the psi value by

7.

How to Use This Calculator

Enter your Pressure in Kilopascals (kPa) (e.g. 220.0 in kPa). Results update instantly as you type — adjust any value to compare scenarios.

The Formula

Conversion factors used in this calculator:

1 kPa = 0.1450377377 psi

Worked Example

Setting tire pressure for an imported passenger car with recommended 220.00 kPa: Multiplied by 0.1450377, it equals 31.91 psi (2.2000 bar).

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.