Plumbing & HVAC

Bar to PSI Calculator

Convert a bar pressure rating into PSI for US gauges, fittings and equipment.

  • Answers as you type
  • Every formula cited
  • Calculated in your browser
SettingsSettings for this calculationUS
Market
Imperial · sales tax
The pressure in bar.

European appliance and fitting ratings are usually gauge pressure, sometimes written barg. Confirm before comparing against an absolute figure.

Pressure

58.02 psi

High confidence

1 bar = 14.5038 psi, from 1 bar = 100,000 Pa exactly. One bar lifts water roughly 10.2 m — useful when comparing a pressure rating against a static head.

Conversion factor applied
14.5 psi per bar
Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

  • 1 bar = 100,000 Pa = 14.503773773 psi

Inputs used

Pressure (bar)
4

Intermediate steps

Conversion factor applied
14.5 psi per bar
Final result58.02 psi

Confidence note: 1 bar = 14.5038 psi, from 1 bar = 100,000 Pa exactly. One bar lifts water roughly 10.2 m — useful when comparing a pressure rating against a static head.

What this calculation does not cover

  • The conversion has no way to know whether the number you typed is gauge or absolute. The two differ by about one atmosphere, roughly 14.7 psi, so on a low-pressure water or gas system converting the wrong one is a larger error than anything else on the page.
  • Pressure is not flow. An appliance minimum is normally a pressure and a flow rate together, and whether the flow actually arrives depends on pipe bore, run length, fittings and height, none of which this calculation touches.
  • Static and dynamic pressure are not distinguished. A standing reading with nothing running is higher than what a fitting sees under flow, and transients such as water hammer or thermal expansion in a closed system go above both. Whichever figure you enter is simply converted.
  • Converting a rating is not checking one. No safety factor and no test-pressure multiplier is applied, and nothing is derated for temperature: plastic pipe, seals and hoses hold materially less hot than cold.
  • Negative gauge pressure is outside the input range. The field floors at zero, so a vacuum reading such as -0.8 barg cannot be converted here.

Add the equipment this sizes

This result is a specification — 58.02 psi — 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. 1 bar = 100,000 Pa = 14.503773773 psi
Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Equipment rated in bar meeting gauges and fittings marked in psi is routine wherever European plant lands on an American site, or vice versa. Multiply by 14.5 and the job is done, though the shortcut of multiplying by fifteen overstates by three percent and should stay out of anything involving a safety margin. Two useful anchors go with this conversion. A compressor's tank pressure and its regulated output are different figures, and tools are specified against the latter. And one bar corresponds to about 10.2 metres of water head, which is the relationship that lets a pump duty, a static lift and a component's pressure rating all be compared on the same terms.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

How to calculate bar to PSI in 2 steps

  1. Pressure (bar)The pressure in bar.
  2. PressureThe tool computes the pressure from those figures and shows the formula, its sources, and a confidence rating alongside it.

Bar to PSI at common values

Page defaults, not your figures above.

Pressure (bar)Pressure (psi)
0.57.25
114.5
229
572.5
10145
20290

Frequently asked questions

Roughly how many psi is a bar?
About 14.5, so a quick mental conversion is to multiply by fifteen and accept a 3% overestimate. For pressure ratings and safety margins, use the exact figure rather than the shortcut.
My compressor is rated in bar but my tools in psi. Does it matter?
Only that you compare like with like. Convert one to the other and check the tool's requirement against the compressor's regulated output, not its maximum tank pressure — those are different numbers and the tank figure is always higher.
How does this relate to head of water?
One bar lifts water about 10.2 metres, or roughly 33.5 feet. That relationship is how pump duties and static heads get compared against pressure ratings, and it is worth knowing when sizing a system in a tall building.
Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.