Pounds per square inch (psi) to Bar (bar) 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.
Bar
The bar is a unit of pressure equal to exactly 100,000 pascals (100 kPa), accepted for use with the SI by the BIPM. It is close to one standard atmosphere (1 atm = 1.01325 bar) making it convenient for many practical applications. The bar is widely used in meteorology (weather maps), industrial gas and fluid systems, and tyre inflation in continental Europe. A typical car tyre is inflated to 2.2–2.5 bar; scuba diving tanks are filled to 200–300 bar.
| Pounds per square inch (psi) | Bar (bar) |
|---|---|
| 0.1 psi | 0.00689 bar |
| 1 psi | 0.0689 bar |
| 2 psi | 0.1379 bar |
| 3 psi | 0.2068 bar |
| 5 psi | 0.3447 bar |
| 10 psi | 0.6895 bar |
| 20 psi | 1.379 bar |
| 30 psi | 2.0684 bar |
| 50 psi | 3.4474 bar |
| 100 psi | 6.8948 bar |
| 1000 psi | 68.9476 bar |
Frequently Asked Questions (FAQ)
How many bar are in 1 pounds per square inch?
1 pounds per square inch (psi) is exactly 0.068948 bar (bar).
How do I convert pounds per square inch to bar?
Multiply the value in pounds per square inch by 0.068948 to get the result in bar. Or use the converter above — type any number and see the result instantly.