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    Convert psi to Atmospheres

    1 psi equals 0.06804596391 atmospheres (atm).

    psi
    Swap: convert atmospheres to psi
    atm

    1 psi = 0.06804596391 atm

    Type in either box. Scientific notation works: 1.5e-3.

    Converting a list? Use the bulk psi to atmosphere converter to paste a column from Excel.

    How to Convert psi to Atmosphere

    • 1 psi = 0.06804596391 atm
    • 1 atm = 14.69594878 psi
    • Example: convert 15 psi to atm: 15 psi = 15 × 0.06804596391 atm = 1.020689459 atm

    Formula

    atm = psi × 0.06804596390988

    or atm = psi ÷ 14.69594877551

    Derivation from SI units:

    • 1 psi = 1 lbf/in² = (0.45359237 kg × 9.80665 m/s²) ÷ (0.0254 m)² = 6894.757293168 Pa
    • 1 atm = 101 325 Pa (exact, by definition)
    • 1 psi = 6894.757293168 Pa ÷ 101325 Pa per atm = 0.06804596390988 atm

    Both units are defined exactly, so the factor is exact. psi definition: psi; Atmosphere definition: atmosphere.

    Worked examples

    1. 14.696 psi is essentially 1.000003486 atm.
      14.696 psi × 0.06804596391 = 1.000003486 atm
    2. An absolute pressure of 100 psi is 6.804596391 atm.
      100 psi × 0.06804596391 = 6.804596391 atm

    psi to Atmosphere conversion table

    psi to Atmosphere conversion table
    psiAtmospheres (atm)
    0.01 psi0.0006804596391 atm
    0.05 psi0.003402298195 atm
    0.1 psi0.006804596391 atm
    0.25 psi0.01701149098 atm
    0.5 psi0.03402298195 atm
    1 psi0.06804596391 atm
    2 psi0.1360919278 atm
    5 psi0.3402298195 atm
    10 psi0.6804596391 atm
    14.7 psi1.000275669 atm
    15 psi1.020689459 atm
    20 psi1.360919278 atm
    25 psi1.701149098 atm
    30 psi2.041378917 atm
    32 psi2.177470845 atm
    35 psi2.381608737 atm
    40 psi2.721838556 atm
    50 psi3.402298195 atm
    60 psi4.082757835 atm
    80 psi5.443677113 atm
    100 psi6.804596391 atm
    125 psi8.505745489 atm
    150 psi10.20689459 atm
    200 psi13.60919278 atm
    500 psi34.02298195 atm
    1000 psi68.04596391 atm
    3000 psi204.1378917 atm
    5000 psi340.2298195 atm

    Where it's used

    Expressing psia values in atmospheres helps with gas-law calculations and diving tables. Use absolute values; gauge readings (psig) need about 14.7 psi added first.

    psi to other pressure units

    1 psi expressed in every pressure unit
    Conversion1 psi equals
    psi to pascal 6894.757293 Pa
    psi to kilopascal 6.894757293 kPa
    psi to megapascal 0.006894757293 MPa
    psi to bar 0.06894757293 bar
    psi to millibar 68.94757293 mbar
    psi to decibar 0.6894757293 dbar
    psi to torr 51.71493257 Torr
    psi to millimeter of mercury 51.7149252 mmHg
    psi to millimeter of water 703.0695796 mmH₂O
    psi to centimeter of water 70.30695796 cmH₂O
    psi to inch of water 27.67990471 inH₂O
    psi to inch of water (60 °F) 27.7075924 inH₂O (60 °F)
    psi to inch of mercury 2.036020677 inHg
    psi to atmosphere 0.06804596391 atm
    psi to barye 68947.57293 Ba

    Frequently asked questions

    How many psi is 1 atm?

    1 atm = 14.69594878 psi.

    How many atmospheres are in 1 psi?

    1 psi = 0.06804596391 atm.

    How do I convert psi to atmospheres?

    Multiply the value in psi by 0.06804596391, or divide it by 14.69594878. For example, 15 psi × 0.06804596391 = 1.020689459 atm.

    Is the psi to atm conversion exact?

    Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).

    Sources

    Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.

    Cite this page

    APA

    Scientific Converters. (2026, October 15). Convert psi to Atmospheres. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/psi-to-atmosphere/

    IEEE

    Scientific Converters, "Convert psi to Atmospheres," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/pressure/psi-to-atmosphere/