American Compressor Company
    American Compressor Company
    Call (800) 955-6188

    Atmospheric Pressure Calculator

    Atmospheric pressure decreases with altitude — this affects every compressor and vacuum system sizing calculation.

    Inputs

    Results

    Atmospheric Pressure
    14.696PSIA
    Atmospheric Pressure
    29.92in Hg
    Atmospheric Pressure
    101.33kPa

    Estimates only. For production sizing decisions, contact our engineering team.

    About this calculator

    Compressor performance is rated at sea-level standard conditions (14.696 PSIA). At higher elevations, the lower ambient pressure means a compressor inhales less air mass per stroke, which reduces effective CFM output and changes the math for SCFM↔ACFM conversion.

    We use the standard barometric formula based on the International Standard Atmosphere up to ~36,000 ft.

    Formula

    P (PSIA) = 14.696 × (1 − 6.8753 × 10⁻⁶ × h)^5.2559, where h is altitude in feet.

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    Talk to an Expert

    Our team has 65+ years in service helping facilities across Los Angeles County find the right compressed air or blower solution. Call us directly or fill out the form — we respond within one business day.

    (800) 955-6188

    Kaeser Authorized Dealer

    Factory warranty and OEM parts on every job.

    Fast Response

    Most service calls scheduled within 24–48 hours.

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