PSI to Kilopascal Conversion Chart
| Pound per square inch (psi) | Kilopascal (kPa) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 1 psi | 6.89 kPa | Single Pound Per Square Inch Hydraulic Reference | 1 × 6.894757 = 6.894757 kPa |
| 2 psi | 13.79 kPa | Low-Pressure Fuel Delivery Tank Line | 2 × 6.894757 = 13.789514 kPa |
| 5 psi | 34.47 kPa | Residential Natural Gas Pressure Regulator | 5 × 6.894757 = 34.473785 kPa |
| 10 psi | 68.95 kPa | HVAC Fan Discharge Air Differential | 10 × 6.894757 = 68.94757 kPa |
| 14.7 psi | 101.35 kPa | Standard Ambient Sea-Level Atmospheric Pressure | 14.7 × 6.894757 = 101.352928 kPa |
| 20 psi | 137.9 kPa | Domestic Water Well Expansion Pressure Tank | 20 × 6.894757 = 137.89514 kPa |
| 30 psi | 206.84 kPa | Compact Automobile Tire Inflation Pressure | 30 × 6.894757 = 206.84271 kPa |
| 32 psi | 220.63 kPa | Passenger Sedan Cold Tire Pressure Standard | 32 × 6.894757 = 220.632224 kPa |
| 35 psi | 241.32 kPa | Light SUV Recommended Highway Tire Inflation | 35 × 6.894757 = 241.316495 kPa |
| 40 psi | 275.79 kPa | Residential Municipal Water Mains Line | 40 × 6.894757 = 275.79028 kPa |
| 60 psi | 413.69 kPa | Commercial Building Plumbing Water Pressure | 60 × 6.894757 = 413.68542 kPa |
| 90 psi | 620.53 kPa | Standard Industrial Pneumatic Tool Airline | 90 × 6.894757 = 620.52813 kPa |
| 100 psi | 689.48 kPa | Heavy Truck Air Brake Compressed Header | 100 × 6.894757 = 689.4757 kPa |
| 150 psi | 1034.21 kPa | Industrial Steam Boiler Discharge Line | 150 × 6.894757 = 1034.21355 kPa |
| 200 psi | 1378.95 kPa | High-Pressure Hydraulic Actuator Delivery | 200 × 6.894757 = 1378.9514 kPa |
Pound per square inch to Kilopascal Formula & Unit Definitions
Based on standard gravity (9.80665 m/s²) and the 1959 treaty definitions of the pound (0.45359237 kg) and inch (0.0254 m), 1 psi equals precisely 6,894.757293 pascals, or approximately 6.894757 kPa. To convert pounds per square inch to kilopascals, multiply the psi value by 6.894757 (or divide by 0.145038). To reverse kilopascals back to psi, multiply by 0.145038.
Quick Estimation: For a quick mental estimate, multiply the psi value by 7. For example, 30 psi × 7 = 210 kPa (actual exact value is 206.84 kPa, accurate within 1.5%).
Pound per Square Inch (psi)
US Customary Standard- Creator & Origin: Originating in 19th-century British steam locomotive and hydraulic engineering, legally defined under the 1959 treaty.
- Standard Definition: Defined as one avoirdupois pound of force applied perpendicularly across one square inch (1 lbf/in² ≈ 6,894.757 Pa).
- Everyday Focus: Passenger car tire inflation (30-35 psi), workshop air tool compressors (90-120 psi), and domestic water heaters.
Kilopascal Standard (kPa)
SI Metric Standard- Creator & Origin: Adopted internationally by the CGPM in 1971 as the decimal multiple of 1,000 pascals (1 kN/m²).
- Standard Definition: Defined as exactly 1,000 newtons per square meter, serving as the official metric pressure standard.
- Everyday Focus: Global vehicle placard specifications, commercial building HVAC duct static pressure, and gas utility distribution.
Frequently Asked Questions
Q.How do you convert PSI to kilopascals?
Multiply the PSI value by 6.894757.
Q.How many kilopascals are in 32 PSI?
32 PSI equals approximately 220.63 kilopascals (often rounded to 220 kPa on vehicle placards).
Q.What is the reciprocal conversion for this tool?
The direct reverse tool is the Kilopascals to PSI Converter, where 1 kPa equals approximately 0.145038 psi.
Q.Why do tire gauges in different countries use PSI or kPa?
The United States primarily utilizes imperial PSI (pounds per square inch), whereas Europe, Japan, and international standards rely on metric bar and kilopascals.