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Unit Conversion Calculators
ATM to PSI Calculator
Convert a pressure in standard atmospheres (atm) to pounds per square inch (PSI).
PSI
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About the ATM to PSI Calculator
The standard atmosphere (atm) is a pressure unit defined as exactly 101,325 pascals, roughly equal to average air pressure at sea level. PSI (pounds per square inch) is the everyday US pressure unit, defined as exactly 6,894.76 pascals.
Formula: Pa = ATM × 101,325 · PSI = Pa ÷ 6,894.76
Used for converting altitude, weather and scientific atmospheric readings into the PSI figures used on US gauges and equipment.
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