Atmospheres (atm) to PSI Converter
Enter a value to instantly convert between pressure units.
1 Atmosphere = 14.6959 Pound per Sq. Inch
Key Formulas
Pound per Sq. Inch → Bar
bar = psi × 0.0689476Bar → Pound per Sq. Inch
psi = bar × 14.5038Atmosphere → Pound per Sq. Inch
psi = atm × 14.6959Pound per Sq. Inch → Atmosphere
atm = psi × 0.068046Formula
psi = atm × 14.6959Atmospheres (atm) measure pressure in multiples of sea-level air pressure. PSI is the imperial unit used in the US. One atmosphere equals roughly 14.7 psi—the baseline for pressure gauge readings. This conversion is useful in chemistry, physics, and diving.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
Atmospheric pressure at sea level. 1 atm = 14.696 psi. Baseline for pressure gauges worldwide.
1 atm = 14.696 psi
Double atmosphere. Used in hyperbaric chambers and deep scuba diving (2+ atm at depth).
2 atm = 29.4 psi
Extreme pressure. 10 atm = ~147 psi. Used in industrial compression, SCUBA tanks.
10 atm = 146.96 psi
Half atmosphere. Low vacuum or partial pressure. ~7.4 psi.
0.5 atm = 7.35 psi