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The pressure in pounds per square inch.
Mains water pressure in a house is commonly 40–80 psi. Check whether a rating is gauge pressure (above atmospheric) or absolute, since the two differ by about 14.7 psi.
Pressure
4.137 bar
1 psi = 0.0689476 bar; 1 bar is defined as exactly 100,000 Pa. Check whether the rating is gauge or absolute — they differ by about 14.7 psi, which dominates a low-pressure system.
- Conversion factor applied
- 0.07 bar per psi
They open the calculator with your figures already in it
PSI to Bar Calculator: 4.14 bar — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- 1 bar = 100,000 Pa exactly; 1 psi = 6,894.757293 Pa, so 1 psi = 0.0689476 bar
Inputs used
- Pressure (psi)
- 60
Intermediate steps
- Conversion factor applied
- 0.07 bar per psi
Confidence note: 1 psi = 0.0689476 bar; 1 bar is defined as exactly 100,000 Pa. Check whether the rating is gauge or absolute — they differ by about 14.7 psi, which dominates a low-pressure system.
What this calculation does not cover
- The conversion is a scale factor and carries no datum. It cannot tell a gauge reading from an absolute one, so psig becomes bar gauge and psia becomes bar absolute — roughly 1.01 bar apart — and nothing here checks which one you typed.
- Converting a pressure does not check it against anything. Component ratings are normally quoted at a reference temperature, and plastics in particular lose capability as the medium gets hotter; no temperature derating, burst-pressure margin or test-pressure allowance is applied to the figure.
- The result is the single reading or rating you entered, nothing else in the system. Static lift, pipe and fitting friction, pump shut-off head, thermal expansion in a closed system and surge from a fast-closing valve all sit outside it — the pressure at a top-floor fixture is not the pressure at the main, and a peak surge is not the standing pressure.
- The output is bar as defined, exactly 100,000 Pa. It is not standard atmospheres (101,325 Pa, about 1.3% higher), and it is not the kgf/cm² still marked on some older European and Asian equipment, which sits roughly 2% below a bar.
- The input floors at zero and will not take a negative number. Vacuum and negative gauge readings have to be converted as a magnitude with the sign put back by hand.
Add the equipment this sizes
This result is a specification — 4.137 bar — not a quantity. Put the thing it sizes into your project: how many, what you call it, and your supplier’s price.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-02 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- 1 bar = 100,000 Pa exactly; 1 psi = 6,894.757293 Pa, so 1 psi = 0.0689476 bar
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Your workspace
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Plumbing components sourced across markets carry pressure ratings in different units, so a European valve rated in bar has to be checked against a system measured in psi. The conversion is exact, and the two things that go wrong sit either side of it. The first is the gauge-versus-absolute distinction: nearly all plumbing ratings are gauge, measured above atmospheric, and treating an absolute figure as gauge shifts everything by about 14.7 psi — negligible on a high-pressure hydraulic circuit and dominant on a low-pressure gas or water system. The second is the casual equivalence of bar and atmospheres, which are about 1.3 percent apart and only interchangeable in conversation.