Atmospheres to Psi Converter
How to convert atmospheres to psi
psi = atmospheres × 14.6959488
To convert atmospheres to psi, multiply the number of atmospheres by 14.6959488.
1 atm = 14.6959488 psi
Examples
- Standard sea-level atmospheric pressure: 1 atm × 14.6959488 = 14.6959488 psi
- 2 atm × 14.6959488 = 29.3918976 psi
Good to know
One standard atmosphere is about 14.696 psi, often rounded to 14.7 psi. Add this to a gauge reading (psig) to get absolute pressure (psia).
This is the standard atmosphere (atm), exactly 101,325 Pa. It is not the technical atmosphere (at), which is 1 kgf/cm² or 98,066.5 Pa.
Psi means pounds-force per square inch (lbf/in²). Gauge readings (psig) are measured relative to atmospheric pressure, absolute readings (psia) relative to a vacuum; the conversion factor is the same for both.
Atmospheres to psi conversion table
| Atmospheres (atm) | Psi |
|---|---|
| 0.1 atm | 1.46959488 psi |
| 0.25 atm | 3.67398719 psi |
| 0.5 atm | 7.34797439 psi |
| 0.75 atm | 11.0219616 psi |
| 1 atm | 14.6959488 psi |
| 1.5 atm | 22.0439232 psi |
| 2 atm | 29.3918976 psi |
| 3 atm | 44.0878463 psi |
| 4 atm | 58.7837951 psi |
| 5 atm | 73.4797439 psi |
| 10 atm | 146.959488 psi |
| 20 atm | 293.918976 psi |
| 50 atm | 734.797439 psi |
| 100 atm | 1,469.59488 psi |
Unit definitions
- Atmosphere (atm)
- The standard atmosphere is defined as exactly 101,325 pascals, approximately the average air pressure at sea level. It is used as a reference pressure in chemistry and physics.
- Psi
- Psi is one pound-force per square inch, about 6894.757 pascals. It is the everyday pressure unit in the United States, used for tires, compressors and plumbing.