**GENERAL GAS LAWS & FORMULAS** |

Equivalents to 1 atmosphere are as follows: |

76 centimeters (760 mm) of mercury |

29.921 inches of mercury |

10.3322 meters of water |

406.782 inches of water |

33.899 feet of water |

14.696 pounds-force per square inch |

2,116.2 pounds-force per square foot |

1.033 kilograms-force per square centimeter |

101.325 kilopascal |

The unit “1 Standard Atmosphere” is defined as the pressure equivalent to that exerted by a 760 mm column of mercury at 0°C (32°F), at sea level, and at standard gravity (32.174 ft/sec2). Atmospheric pressure is the weight of a column of air per area unit as measured from the top of the atmosphere to the reference point being measured. Atmospheric pressure decreases as altitude increases. |