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    PSI to Bar

    Convert PSI to Bar

    "PSI to Bar" Calculator

    Convert
    PSI to Bar

    How to convert pounds per square inch to bars

    Worked example: 35 psi ≈ 2.41 bar

    psibar02040012335 psi2.41 bar

    35 psi × 4.4482216152605 ÷ 64.516 ≈ 2.41 bar

    64.516 = 100,000 Pa in a bar × 0.00064516 m² in a square inch; 4.4482216152605 N in a pound-force

    Rule: bars = pounds per square inch × 4.4482216152605 ÷ 64.516 ≈ pounds per square inch ÷ 14.5038 — 1 psi = 1 lbf/in².
    Most asked values
    Pounds per square inchBars
    1 psi0.0689 bar
    14.7 psi1.01 bar
    15 psi1.03 bar
    20 psi1.38 bar
    30 psi2.07 bar
    32 psi2.21 bar
    33 psi2.28 bar
    35 psi2.41 bar
    36 psi2.48 bar
    40 psi2.76 bar
    42 psi2.9 bar
    50 psi3.45 bar
    60 psi4.14 bar
    80 psi5.52 bar
    100 psi6.89 bar
    120 psi8.27 bar
    150 psi10.34 bar
    200 psi13.79 bar
    1,000 psi68.95 bar
    3,000 psi206.84 bar

    See Also

    Last Results

    FAQ

    How many bar is 1 psi?

    1 psi ≈ 0.0689476 bar, and 1 bar ≈ 14.5038 psi. Exactly, bar = psi × 4.4482216152605 ÷ 64.516: the fraction never ends, so every answer in bar is rounded.

    Where do 4.4482216152605 and 64.516 come from?

    A psi is one pound-force (4.4482216152605 N exactly) on one square inch, and a bar is exactly 100,000 Pa. 64.516 is 100,000 Pa in a bar times 0.00064516 m² in a square inch, so the answer in bar is the number of psi × 4.4482216152605 ÷ 64.516.

    Gauge or absolute pressure: does it matter?

    No, as long as both sides are of the same kind. Gauge pressure (psig, barg) counts from the surrounding air, absolute pressure (psia, bara) from vacuum, and the factor is the same for both. Tire and compressor gauges show gauge pressure.

    Why is 14.7 psi about one atmosphere?

    The standard atmosphere is exactly 101,325 Pa, which is ≈ 14.7 psi or 1.01325 bar. A tire gauge reads 0 at that air pressure: it shows how much more the tire holds.