PSI to Pascal Conversion Chart
| Pound per square inch (psi) | Pascal (Pa) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0.1 psi | 689.4757 Pa | Delicate Industrial Differential Pressure Air Gauge | 0.1 × 6894.757 = 689.4757 Pa |
| 0.5 psi | 3447.379 Pa | Residential Low-Pressure Natural Gas Meter Inlet | 0.5 × 6894.757 = 3447.379 Pa |
| 1 psi | 6894.757 Pa | Standard Imperial One Pound Per Square Inch Unit | 1 × 6894.757 = 6894.757 Pa |
| 2 psi | 13789.51 Pa | Inflatable Boat Collar Working Operating Pressure | 2 × 6894.757 = 13789.51 Pa |
| 5 psi | 34473.79 Pa | Residential Low-Pressure Steam Heating Boiler Chamber | 5 × 6894.757 = 34473.79 Pa |
| 10 psi | 68947.57 Pa | Domestic Garden Sprinkler Head Hydrostatic Line | 10 × 6894.757 = 68947.57 Pa |
| 14.69595 psi | 101325 Pa | Defined Standard Atmospheric Sea Level Pressure Level | 14.69595 × 6894.757 = 101325 Pa |
| 20 psi | 137895.1 Pa | Lawn Tractor Pneumatic Turf Tire Working Pressure | 20 × 6894.757 = 137895.1 Pa |
| 30 psi | 206842.7 Pa | Compact Passenger Vehicle Cold Tire Minimum Inflation | 30 × 6894.757 = 206842.7 Pa |
| 35 psi | 241316.5 Pa | Midsize Crossover SUV Standard Cold Tire Spec | 35 × 6894.757 = 241316.5 Pa |
| 50 psi | 344737.9 Pa | Domestic Potable Water Well Pump Cut-Off Switch | 50 × 6894.757 = 344737.9 Pa |
| 90 psi | 620528.1 Pa | Workshop Pneumatic Impact Wrench Operating Air Line | 90 × 6894.757 = 620528.1 Pa |
| 100 psi | 689475.7 Pa | Road Racing Bicycle High-Pressure Skinny Tire | 100 × 6894.757 = 689475.7 Pa |
| 150 psi | 1034214 Pa | Commercial Transport Air Brake Reservoir Working Head | 150 × 6894.757 = 1034214 Pa |
| 200 psi | 1378951 Pa | Hydraulic Vehicle Lift Actuator Low-Side Pressure | 200 × 6894.757 = 1378951 Pa |
Pound per square inch to Pascal Formula & Unit Definitions
The exact relationship derives from physical force conversions: 1 pound-force ≈ 4.448222 N and 1 square inch = 0.00064516 m². Dividing force by area yields 4.448221615 ÷ 0.00064516 ≈ 6,894.75729 pascals per psi. To convert psi to pascals, multiply the psi value by 6,894.757 (or divide by 0.0001450377). To convert pascals back to psi, multiply by 0.0001450377 (or divide by 6,894.757).
Quick Estimation: Multiply the psi value by 7,000 and subtract roughly 1.5%. For quick estimation, 10 psi × 7,000 ≈ 70,000 Pa (actual: 68,948 Pa); 30 psi × 7,000 ≈ 210,000 Pa (actual: 206,843 Pa).
Pounds per Square Inch (psi)
Imperial Engineering Baseline- Creator & Origin: Originated during the British Industrial Revolution to calibrate steam locomotive engines and boilers.
- Standard Definition: Defined as one avoirdupois pound-force (lbf) distributed across one square inch of planar area.
- Everyday Focus: Automotive tire pressure, workshop air compressors, hydraulic machine rams, and residential plumbing.
Pascal (Pa)
SI Metric Base Standard- Creator & Origin: Named in honor of Blaise Pascal, mathematician and pioneer of hydrostatics and barometry.
- Standard Definition: Defined as exactly one newton of perpendicular force applied over one square meter (1 N/m²).
- Everyday Focus: Acoustic sound pressure, building ventilation micro-pressures, cleanroom airflow, and fluid dynamics.
Frequently Asked Questions
Q.How many pascals are in one psi?
There are approximately 6,894.757 pascals in one pound per square inch (1 psi ≈ 6.895 kPa).
Q.What is the reverse conversion from pascals to psi?
To convert in reverse, use the Pascals to PSI Converter where 1 Pa equals ~0.000145038 psi.
Q.What is standard atmospheric pressure in psi?
Standard atmospheric pressure at sea level is approximately 14.69595 psi (often rounded to 14.7 psi).
Q.How do I convert psi to kilopascals (kPa)?
Multiply your psi value by 6.894757 (e.g. 30 psi × 6.894757 ≈ 206.84 kPa).
Q.Why is psi still used in North America?
Pound per square inch is deeply ingrained in US customary engineering standards, automotive manufacturing, and building codes.