UnitConAtmospheres to PSI Converter
Convert atmospheres to PSI for diving, laboratory work, and physics problems. Atmospheric pressure is a natural reference point in science, while PSI is the practical unit for gauges and tools in the US.
Formula
Multiply atmospheres by 14.6959 to get PSI. To reverse, divide PSI by 14.6959 to get atmospheres.
Quick reference
| Atmosphere (atm) | Pound per Square Inch (psi) |
|---|---|
| 1 | 14.69595 |
| 2 | 29.3919 |
| 3 | 44.08785 |
| 4 | 58.7838 |
| 5 | 73.47974 |
| 10 | 146.9595 |
| 20 | 293.919 |
| 50 | 734.7974 |
| 100 | 1,469.595 |
| 200 | 2,939.19 |
About these units
Atmosphere
The standard atmosphere (atm) was defined in 1954 as exactly 101,325 Pa, based on the average pressure at sea level. It is widely used as a reference pressure in chemistry and physics, particularly for gas-related calculations.
Pound per Square Inch
PSI (pounds per square inch) is the gauge pressure standard in US industry. Tire gauges, scuba tanks, and air compressors in the US display pressure in PSI.
Frequently asked questions
1 atm = 14.6959 PSI — standard sea-level atmospheric pressure.
Every 10 meters of water adds about 1 atm, so at 10 m depth the absolute pressure is 2 atm ≈ 29.4 PSI.
3 × 14.6959 ≈ 44.09 PSI.