psi to bar converter

What is a psi to bar converter?

A psi to bar converter is an online tool that translates a pressure value expressed in pounds per square inch (psi) into its equivalent in bar, and vice versa. Both units describe the same physical quantity — pressure, or force applied per unit of area — but they come from different traditions. The psi is the customary pressure unit in the United States, widely used for tire inflation, plumbing, and industrial equipment, while the bar is a metric unit common in Europe for the same everyday tasks. Because the two differ by a factor of roughly fourteen and a half, a quick converter is useful whenever you switch between an American gauge and a metric one.

How does it work?

The conversion rests on fixed definitions. One bar is defined as exactly 100,000 pascals (Pa), and one psi equals about 6,894.76 pascals. Dividing the two gives the conversion factor: 1 bar equals about 14.5037738 psi. To go the other way, you take the reciprocal, so 1 psi equals about 0.0689476 bar.

Enter a value in either field and the other field updates automatically, so you can move from psi to bar or from bar to psi without re-entering anything. The psi side also exposes pascals (Pa) and kilopascals (kPa), and the bar side exposes atmospheres (atm) and kPa, making it easy to cross-check a single value against several common pressure units.

Formula

To convert pounds per square inch to bar, divide by 14.5037738:

$\text{bar} = \frac{\text{psi}}{14.5037738}$

To convert bar back to psi, multiply by the same factor:

$\text{psi} = \text{bar} \times 14.5037738$

psi to bar conversion table

The table below lists common psi values with their bar equivalents (rounded to five decimal places).

Examples

Example 1: Converting 14.5038 psi to bar

One bar is defined so that it equals about 14.5038 psi. Dividing by the conversion factor confirms this:

$\frac{14.5038}{14.5037738} = 1.0000 \text{ bar}$

So 14.5038 psi is essentially exactly 1 bar — the small remainder comes only from rounding the factor.

Example 2: Converting 1 bar back to psi

Many European tire gauges and pumps read in bar. To express 1 bar in psi:

$1 \times 14.5037738 = 14.5038 \text{ psi}$

This is why a “2 bar” tire pressure recommendation corresponds to roughly 29 psi.

Example 3: Converting 32 psi to bar

A typical car tire is inflated to about 32 psi. Converting:

$\frac{32}{14.5037738} = 2.2066 \text{ bar}$

So 32 psi is a little over 2.2 bar.

Example 4: Converting 1 psi to kilopascals

If you switch the target unit to kPa, the converter shows the underlying SI-based value:

$1 \text{ psi} = 6.89476 \text{ kPa}$

Notes

• Both the psi and the bar are non-SI units; the SI unit of pressure is the pascal (Pa).
• 1 bar = 100,000 Pa exactly, while 1 psi ≈ 6,894.76 Pa, giving the factor 1 bar ≈ 14.5038 psi.
• For quick mental estimates, 1 bar is close to “about 14.5 psi”, and 1 psi is close to “about 0.069 bar”.
• If you need atmospheres instead of psi, see the atmosphere to bar converter.

Frequently asked questions

How many psi are in 1 bar?

There are about 14.5038 psi in one bar, because 1 bar is defined as 100,000 Pa and 1 psi equals about 6,894.76 Pa.

How do I convert psi to bar?

Divide the value in psi by 14.5037738. For example, 32 psi equals about 2.21 bar.

What is 2 bar in psi?

Two bar equals about 29.01 psi (2 times 14.5038), which is a common recommended pressure for passenger-car tires.

Is 1 psi the same as 1 bar?

No. One bar is much larger — about 14.5 times a single psi — so the two are never interchangeable without converting.

Why does the converter also show Pa, kPa and atm?

Pressure is reported in many units depending on the field: pascals and kilopascals in science and engineering, bar and atmospheres in weather and diving, and psi in the United States. Showing several of them lets you cross-check one value against whichever unit you need.