Atmospheres (atm) to Pounds per square inch (psi) Conversion
Atmospheres
The standard atmosphere (atm) is a unit of pressure defined as exactly 101,325 Pa, representing the approximate mean atmospheric pressure at sea level. It remains in use in chemistry for expressing gas pressures in thermodynamic tables and standard conditions (STP: 0 °C and 1 atm). One atmosphere supports a mercury column of exactly 760 mm — the basis of the mercury barometer invented by Torricelli in 1643. In deep-sea diving, pressure is expressed in atmospheres absolute (ATA).
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.
| Atmospheres (atm) | Pounds per square inch (psi) |
|---|---|
| 0.1 atm | 1.4696 psi |
| 1 atm | 14.6959 psi |
| 2 atm | 29.3919 psi |
| 3 atm | 44.0878 psi |
| 5 atm | 73.4797 psi |
| 10 atm | 146.9595 psi |
| 20 atm | 293.919 psi |
| 30 atm | 440.8785 psi |
| 50 atm | 734.7974 psi |
| 100 atm | 1,469.5949 psi |
| 1000 atm | 14,695.9488 psi |
Frequently Asked Questions (FAQ)
How many pounds per square inch are in 1 atmospheres?
1 atmospheres (atm) is exactly 14.696 pounds per square inch (psi).
How do I convert atmospheres to pounds per square inch?
Multiply the value in atmospheres by 14.696 to get the result in pounds per square inch. Or use the converter above — type any number and see the result instantly.