Bar to Psi Converter

Need to convert bar to psi? This free online bar to psi converter does it in your browser: type a value in bar and the psi answer appears as you type, alongside the same figure in every other pressure unit. Bar and Pound per square inch describe the same quantity on two different scales, so the bar to psi conversion is a single arithmetic step once you know the exact factor. Nothing is uploaded and there is no sign-up — the answer is computed on your device as fast as you can type.

The bar to psi formula

One bar is 14.5038 psi:

psi = bar × 14.5038
bar = psi × 0.068948

That is the whole bar to psi formula: multiply to go one way, divide — or multiply by the inverse — to come back. The factor is a defined constant rather than a measurement, so a bar to psi conversion done this way carries no uncertainty of its own; the only open question is how many decimal places to display, which is covered further down.

Worked example

10 bar = 145.0377 psi. Enter 10 in the box above and you will see exactly that, plus the value carried across the rest of the pressure scale so you can sanity-check it against a unit you already recognise. It is the quickest way to convert bar to psi when the answer has to be exact rather than estimated.

How to convert bar to psi by hand

1. Write the value down in bar — 25 bar is used here.
2. Multiply it by 14.5038, because 1 bar = 14.5038 psi.
3. Read the answer: 25 bar = 362.5943 psi.
4. To come back, divide by 14.5038, or multiply by 0.068948 instead — 1 psi = 0.068948 bar.

Bar to Psi conversion table

Every figure below comes from the same engine as the box at the top of this page, shown at its Automatic precision, so each row is exactly what you would see after typing that value in. Treat it as a ready-made bar to psi chart for the values people reach for most.

Why convert bar to psi?

bar to psi questions rarely arrive alone: they show up when metric gauges meet imperial ones — tyre pressures, gas systems, diving tables and industrial equipment. In each case a bar reading has to become psi — or be checked against one — before it can be used, and a guessed conversion is how the wrong size gets ordered, the wrong setting gets dialled in or the wrong amount gets poured. This free pressure converter exists for that moment: the bar to psi answer is exact, the full pressure table sits one glance away, and everything runs locally in the browser — no sign-up, and none of the values you type are uploaded anywhere.

One bar in every pressure unit

The 14.5038 psi figure the converter shows for 1 bar is one row of this table — the row it defaults to. The others are here so a single reading can be checked against any further pressure unit without running the conversion twice.

Estimating bar to psi without a calculator

One habit worth keeping is to memorise two anchor points on the bar-to-psi line: 10 bar is 145.0377 psi, and 100 bar is 1,450.38 psi — both computed by the same engine as the converter above, not rounded by hand. With those anchors in mind, a mental bar to psi estimate becomes a matter of proportion: a value between the anchors has an answer between them too, and a mental conversion that lands far outside them is a sign that the factor has almost certainly been inverted. The converter above is there for every time an estimate is not good enough.

Which direction the numbers move

Because 1 bar = 14.5038 psi, converting bar to psi increases the size of the number: 100 bar becomes 1,450.38 psi, while 100 psi becomes 6.8948 bar. If a result moves the other way, the factor has been inverted — the two directions are reciprocals and never the same number.

How many decimals to keep

The relationship between bar and psi is a defined constant, but written out in decimal it runs past eight places, so every figure on screen is a rounding of it. Automatic shows 14.5038, which is within 0.00018% of the true quotient, and the menu (Automatic, whole numbers, or 2, 4, 6 and 8 decimal places) keeps more or fewer digits when a specification asks for a fixed count.

About these units

Pressure conversions reduce to the pascal. Standard atmospheric pressure is defined as exactly 101.325 kilopascals, and the pound per square inch is exactly 6,894.757293168 pascals, so both resolve cleanly.

Converting the other way

Press Swap to turn this into a psi-to-bar converter in place. The inverse factor, 1 psi = 0.068948 bar, is shown in the arithmetic panel so you can check the reverse calculation independently.