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    Convert Kilopascals to Atmospheres

    1 kilopascal (kPa) equals 0.009869232667 atmospheres (atm).

    kPa
    Swap: convert atmospheres to kilopascals
    atm

    1 kPa = 0.009869232667 atm

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

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

    How to Convert Kilopascal to Atmosphere

    • 1 kPa = 0.009869232667 atm
    • 1 atm = 101.325 kPa
    • Example: convert 15 kPa to atm: 15 kPa = 15 × 0.009869232667 atm = 0.14803849 atm

    Formula

    atm = kPa × 0.00986923266716

    or atm = kPa ÷ 101.325

    Derivation from SI units:

    • 1 kPa = 10³ Pa
    • 1 atm = 101 325 Pa (exact, by definition)
    • 1 kPa = 1000 Pa ÷ 101325 Pa per atm = 0.00986923266716 atm

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

    Worked examples

    1. An absolute pressure of 500 kPa is 4.934616334 atm.
      500 kPa × 0.009869232667 = 4.934616334 atm
    2. The air pressure at about 3000 m, roughly 70 kPa, is 0.6908462867 atm.
      70 kPa × 0.009869232667 = 0.6908462867 atm

    Kilopascal to Atmosphere conversion table

    Kilopascal to Atmosphere conversion table
    Kilopascals (kPa)Atmospheres (atm)
    0.1 kPa0.0009869232667 atm
    0.25 kPa0.002467308167 atm
    0.5 kPa0.004934616334 atm
    1 kPa0.009869232667 atm
    2 kPa0.01973846533 atm
    2.5 kPa0.02467308167 atm
    5 kPa0.04934616334 atm
    10 kPa0.09869232667 atm
    20 kPa0.1973846533 atm
    50 kPa0.4934616334 atm
    100 kPa0.9869232667 atm
    101.325 kPa1 atm
    150 kPa1.4803849 atm
    200 kPa1.973846533 atm
    220 kPa2.171231187 atm
    250 kPa2.467308167 atm
    300 kPa2.9607698 atm
    350 kPa3.454231434 atm
    400 kPa3.947693067 atm
    500 kPa4.934616334 atm
    600 kPa5.9215396 atm
    700 kPa6.908462867 atm
    800 kPa7.895386134 atm
    1000 kPa9.869232667 atm
    2000 kPa19.73846533 atm

    Where it's used

    Expressing absolute pressures in atm shows how many sea-level atmospheres they represent, which is handy for gas laws, diving and high-altitude work.

    Kilopascal to other pressure units

    1 kPa expressed in every pressure unit
    Conversion1 kPa equals
    kilopascal to pascal 1000 Pa
    kilopascal to megapascal 0.001 MPa
    kilopascal to psi 0.1450377377 psi
    kilopascal to bar 0.01 bar
    kilopascal to millibar 10 mbar
    kilopascal to decibar 0.1 dbar
    kilopascal to torr 7.500616827 Torr
    kilopascal to millimeter of mercury 7.500615758 mmHg
    kilopascal to millimeter of water 101.9716213 mmH₂O
    kilopascal to centimeter of water 10.19716213 cmH₂O
    kilopascal to inch of water 4.01463076 inH₂O
    kilopascal to inch of water (60 °F) 4.01864652 inH₂O (60 °F)
    kilopascal to inch of mercury 0.295299833 inHg
    kilopascal to atmosphere 0.009869232667 atm
    kilopascal to barye 10000 Ba

    Frequently asked questions

    How many kPa is 1 atm?

    Exactly 101.325 kPa.

    How many atmospheres are in 1 kilopascal?

    1 kPa = 0.009869232667 atm.

    How do I convert kilopascals to atmospheres?

    Multiply the value in kPa by 0.009869232667, or divide it by 101.325. For example, 15 kPa × 0.009869232667 = 0.14803849 atm.

    Is the kPa 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 Kilopascals to Atmospheres. Retrieved October 17, 2026, from https://scientificconverters.com/pressure/kilopascal-to-atmosphere/

    IEEE

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