Atmospheres to PSI Converter
Quickly convert standard atmospheres (atm) to PSI with precision. Enter a value and get instant results.
1 Atmosphere (atm) = 14.695943 PSI (lb/in²)
Conversion Table
| Atmosphere (atm) | PSI (lb/in²) |
|---|---|
| 1 atm | 14.695943 psi |
| 5 atm | 73.479715 psi |
| 10 atm | 146.95943 psi |
| 25 atm | 367.398575 psi |
| 50 atm | 734.79715 psi |
| 100 atm | 1469.594301 psi |
| 500 atm | 7347.971503 psi |
| 1000 atm | 14695.943006 psi |
What Is Atmospheres to PSI Conversion?
Converting atmospheres to PSI translates the scientific pressure reference unit to the US customary pressure unit. One standard atmosphere equals exactly 14.696 PSI (commonly rounded to 14.7 PSI). The atmosphere is defined as the average air pressure at sea level and is used as a reference in science, diving, and engineering. PSI is the practical pressure unit used in the United States. This conversion is important for diving calculations, industrial pressure systems, and scientific applications.
Conversion Formula
PSI = Atmospheres × 14.696
Conversion Table
| atm | psi |
|---|---|
| 1 | 14.695943 |
| 5 | 73.479715 |
| 10 | 146.95943 |
| 25 | 367.398575 |
| 50 | 734.79715 |
| 100 | 1469.594301 |
| 250 | 3673.985751 |
| 500 | 7347.971503 |
| 1000 | 14695.943006 |
Practical Examples
Standard atmospheric pressure of 1 atm equals exactly 14.696 psi, often rounded to 14.7 psi in everyday engineering use. A car tire inflated to 2.2 atm has approximately 32.3 psi, the reading shown on US tire pressure gauges. Scuba divers descending to 10 meters experience about 2 atm, which is roughly 29.4 psi — useful context for understanding diving equipment ratings. An autoclave sterilizer operating at 2 atm applies about 29.4 psi, the unit used in American medical equipment specifications.
When Do You Need This Conversion?
You need atm to PSI conversion when calculating diving pressures and decompression tables, when converting scientific pressure data to practical US measurements, when interpreting vacuum specifications, or when working with pressure vessels and industrial systems that reference atmospheric pressure multiples.
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Frequently Asked Questions
One standard atmosphere equals exactly 14.696 PSI (commonly rounded to 14.7 PSI). This is the average atmospheric pressure at sea level. Quick reference: 0.5 atm = 7.35 PSI, 1 atm = 14.70 PSI, 2 atm = 29.39 PSI, 3 atm = 44.09 PSI, 5 atm = 73.48 PSI, 10 atm = 146.96 PSI.
Atmospheric pressure decreases with altitude. At sea level: 1 atm (14.7 PSI). At 5,000 ft (1,524 m): ~0.83 atm (12.2 PSI). At 10,000 ft (3,048 m): ~0.69 atm (10.1 PSI). At 18,000 ft (5,486 m): ~0.50 atm (7.3 PSI). On top of Mt. Everest (29,032 ft): ~0.33 atm (4.9 PSI). Commercial aircraft cabins are pressurized to about 0.75 atm.
Underwater, pressure increases by approximately 1 atmosphere for every 10 meters (33 feet) of depth. At 10 m depth: 2 atm (29.4 PSI), at 20 m: 3 atm (44.1 PSI), at 30 m: 4 atm (58.8 PSI). These pressure calculations are critical for dive planning, decompression schedules, and preventing conditions like nitrogen narcosis and decompression sickness.