Pounds per square inch (psi) to Pascals (Pa) Conversion
Pounds per square inch
Pounds per square inch (psi) is a unit of pressure defined as one pound-force per square inch (approximately 6,894.76 Pa). It is the standard for tyre pressure, hydraulic systems, and gas cylinders in the United States. Standard atmospheric pressure is approximately 14.696 psi. In engineering, gauge pressure (psig — relative to atmosphere) is distinguished from absolute pressure (psia — relative to a perfect vacuum), a distinction critical in thermodynamics and fluid system design.
Pascals
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square metre (N/m²), named after French mathematician Blaise Pascal who studied fluid pressure in the 17th century. Standard atmospheric pressure at sea level is 101,325 Pa (101.3 kPa). The pascal is a small unit for everyday use — a gentle breeze exerts approximately 1 Pa of dynamic pressure — so kilopascals (kPa) and megapascals (MPa) are more common in practical engineering contexts.
| Pounds per square inch (psi) | Pascals (Pa) |
|---|---|
| 0.1 psi | 689.4757293168 Pa |
| 1 psi | 6894.757293168 Pa |
| 2 psi | 13789.514586336 Pa |
| 3 psi | 20684.271879504 Pa |
| 5 psi | 34473.78646584 Pa |
| 10 psi | 68947.57293168 Pa |
| 20 psi | 137895.14586336 Pa |
| 30 psi | 206842.71879504 Pa |
| 50 psi | 344737.8646584 Pa |
| 100 psi | 689475.7293168 Pa |
| 1000 psi | 6894757.293168 Pa |