PSI to Atmospheres Converter
Quickly convert PSI to standard atmospheres (atm) with precision. Enter a value and get instant results.
1 PSI (lb/in²) = 0.068046 Atmosphere (atm)
Conversion Table
| PSI (lb/in²) | Atmosphere (atm) |
|---|---|
| 1 psi | 0.068046 atm |
| 5 psi | 0.34023 atm |
| 10 psi | 0.68046 atm |
| 25 psi | 1.70115 atm |
| 50 psi | 3.4023 atm |
| 100 psi | 6.804599 atm |
| 500 psi | 34.022995 atm |
| 1000 psi | 68.045991 atm |
What Is PSI to Atmospheres Conversion?
Converting PSI to atmospheres translates the US customary pressure unit to the scientific reference unit. One PSI equals approximately 0.068046 atmospheres. This conversion is used in scientific calculations, diving decompression tables, and engineering contexts where pressure is expressed relative to standard atmospheric pressure. Understanding pressure in atmospheres provides an intuitive sense of how many times greater than sea-level pressure a measurement represents.
Conversion Formula
Atmospheres = PSI ÷ 14.696
When Do You Need This Conversion?
You need PSI to atm conversion when expressing gauge pressures in terms of atmospheric multiples for scientific work, when calculating diving depths from pressure readings, when converting industrial pressure data to scientific notation, or when determining how many atmospheres of pressure a vessel or system is under.
Frequently Asked Questions
Divide the PSI value by 14.696. For example: 44 PSI ÷ 14.696 = 2.99 atm (approximately 3 atmospheres). Common conversions: 14.7 PSI = 1 atm, 29.4 PSI = 2 atm, 44.1 PSI = 3 atm, 73.5 PSI = 5 atm, 147 PSI = 10 atm.
Gauge pressure (psig) measures pressure above atmospheric pressure, while absolute pressure (psia) includes atmospheric pressure. Absolute pressure = gauge pressure + atmospheric pressure. At sea level: 0 psig = 14.7 psia = 1 atm. A tire at 32 psig has an absolute pressure of 46.7 psia = 3.18 atm. Scientific calculations typically use absolute pressure.
Standard atmospheric pressure (1 atm) equals: 14.696 PSI, 1.01325 bar, 101.325 kPa, 1,013.25 millibars (hPa), 760 mmHg (torr), 29.921 inHg, and 101,325 pascals. This is defined as the average pressure at mean sea level at 15°C. All these values represent the same physical pressure in different measurement systems.