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    Pressure Conversion

    20 Pound/sq inch to Atmosphere (std)

    Quick answer

    20 Pound/sq inch (psi) equals

    1.360919 atm

    To convert 20 Pound/sq inches to Atmosphere (std)s, multiply by 0.0680459639. Therefore, 20 Pound/sq inch (psi) equals 1.360919 Atmosphere (std) (atm).

    Formula: atm = psi × 0.0680459639. Calculation: 20 × 0.0680459639 = 1.360919 atm.

    Convert Pound/sq inch (psi) to Atmosphere (std) (atm) online with our free unit converter. In pressure, 1 psi = 0.068046 atm. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.

    Worked example: converting Pound/sq inch to Atmosphere (std)

    1. Step 1 — start with the formula. atm = psi × 0.0680459639
    2. Step 2 — substitute your figure. 20 psi × 0.0680459639
    3. Step 3 — read the result. 20 psi = 1.360919 atm
    4. Step 4 — check it in reverse. psi = atm × 14.6959487755 returns 20 psi, which matches the figure you started with.

    Pressure Converter

    29 units available

    Decimals:
    1.360919

    20 psi = 1.360919 atm

    Formula:

    atm = psi × 0.0680459639

    With your value: 20 psi = 1.36091928 atm

    Other Pound/sq inch to Atmosphere (std) conversions

    14 psi to atm15 psi to atm16 psi to atm18 psi to atm21 psi to atm24 psi to atm25 psi to atmFull Pound/sq inch to Atmosphere (std) converter

    Pound/sq inch to Atmosphere (std) Conversion Table

    Pound/sq inch (psi)Atmosphere (std) (atm)
    0.50.034023
    10.068046
    20.136092
    50.34023
    100.68046
    151.020689
    201.360919
    251.701149
    503.402298
    1006.804596
    25017.011491
    50034.022982
    100068.045964

    Atmosphere (std) to Pound/sq inch Conversion Table

    Atmosphere (std) (atm)Pound/sq inch (psi)
    0.57.347974
    114.695949
    229.391898
    573.479744
    10146.959488
    15220.439232
    20293.918976
    25367.398719
    50734.797439
    1001,469.594878
    2503,673.987194
    5007,347.974388
    100014,695.948776

    Where these values come from

    Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

    Pound/sq inch (psi)

    Pressure

    Exact conversion

    1 psi = 1 lbf/in² = 6894.757 293 168 361 Pa exactly.

    Source: NIST Special Publication 811, Guide for the Use of the International System of Units

    National Institute of Standards and Technology (US) · Reviewed 2026-07-01

    Atmosphere (std) (atm)

    Pressure

    Exact conversion

    The standard atmosphere is exactly 101 325 Pa.

    Source: Units accepted for use with the SI, SI Brochure Table 8

    Bureau International des Poids et Mesures · Reviewed 2026-07-01

    Standards and context behind Pound/sq inch to Atmosphere (std)

    Standard atmosphere
    Defined as exactly 101,325 Pa (14.6959 psi) by the 10th CGPM (1954).

    How to Convert Pound/sq inch to Atmosphere (std)

    To convert from Pound/sq inch (psi) to Atmosphere (std) (atm), multiply the value by 0.0680459639.

    Formula: atm = psi × 0.0680459639

    Reverse: psi = atm × 14.6959487755

    Step-by-Step Example

    1. Start with your value in Pound/sq inch. For example: 5 psi
    2. Multiply by the conversion factor: 5 x 0.0680459639
    3. The result is: 0.34023 atm

    Pound/sq inch and Atmosphere (std) Relationship

    This calculation facilitates standardized conversion between recognized units of pressure. Since 1 Pound/sq inch represents a fraction of a Atmosphere (std) (1 Atmosphere (std) ≈ 14.6959 Pound/sq inches), the Atmosphere (std) is the larger measurement interval. Understanding the relationship between Pound/sq inch and Atmosphere (std) is essential for accurate calculations in physics, engineering, commerce, and daily applications.

    About Pound/sq inch

    Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.

    Common uses of Pound/sq inch: tire pressure (US), hydraulics, HVAC.

    About Atmosphere (std)

    One standard atmosphere equals 101,325 Pascals and represents the average air pressure at sea level.

    Common uses of Atmosphere (std): diving, weather, chemistry.

    Frequently Asked Questions

    What is 20 Pound/sq inch in Atmosphere (std)?
    20 Pound/sq inch equals 1.360919 Atmosphere (std).
    How many Atmosphere (std)s are in 1 Pound/sq inch?
    There are exactly 0.0680459639 Atmosphere (std)s in 1 Pound/sq inch. This means the conversion factor from Pound/sq inch to Atmosphere (std) is 0.0680459639.
    What is the formula to convert Pound/sq inch to Atmosphere (std)?
    The formula to convert Pound/sq inch to Atmosphere (std) is: atm = psi × 0.0680459639. For example, to convert 10 Pound/sq inches to Atmosphere (std)s, you would multiply 10 by 0.0680459639.
    What is a Pound/sq inch?
    Pounds per square inch (psi) is an imperial unit of pressure widely used in the US for tire pressure, hydraulics, and engineering.
    What is a Atmosphere (std)?
    One standard atmosphere equals 101,325 Pascals and represents the average air pressure at sea level.
    What are the common uses of Pound/sq inch?
    The Pound/sq inch is commonly used in tire pressure (US), hydraulics, HVAC.
    What is 1 atm in psi?
    14.6959 psi at sea-level standard conditions.

    Related Pressure Conversions

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    Cite this page

    UnitConvertLab. (2026). 20 Pound/sq inch to Atmosphere (std). UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/20-psi-to-atmosphere