Bar to Pa Converter

Common questions

How many pascals are in 1 bar?

Exactly 100,000 Pa, because the bar is defined as one hundred thousand pascals rather than measured against anything. The rest is a decimal shift: 0.5 bar is 50,000 Pa, 1.5 bar is 150,000 Pa, 2.2 bar is 220,000 Pa, 6 bar is 600,000 Pa and 200 bar is 20,000,000 Pa. The headline prints the figure with thousands separators, and the Copy result button puts it on the clipboard without them, as 100000.

What is the formula for bar to Pa?

Pascals = bar × 100,000, and bar = pascals / 100,000 in the other direction, so 1 Pa is 0.00001 bar and 101,325 Pa is 1.01325 bar. Type decimals with a full stop: a comma is read as a thousands separator and removed, so 1,234.5 comes through as 1234.5 but 1,5 is read as 15 rather than 1.5. The Swap units button between the two boxes reverses the pair, which turns this page into a Pa to bar converter without a reload.

Is the bar to pascal conversion exact?

Yes. The bar is not an SI unit, but it is defined as exactly 100,000 pascals, so the factor is a definition and never gets revised or rounded. Compare that with pounds per square inch, where one psi works out at 6,894.75729316836 and more pascals, a decimal that never ends. Results here are shown to twelve significant digits, which a power of ten never needs, though it does tidy the binary arithmetic: 1.013 bar prints as 101,300 Pa rather than 101,299.999999999.

What is 1 bar in kPa, psi and atm?

100 kPa, 14.503773773 psi and 0.986923266716 atm. You do not have to ask for them one at a time, because the converter works out every unit in the pressure category at once, so all three sit in the list under the pascal answer as soon as you type. Millimetres of mercury stay hidden until you turn on the uncommon units switch in the readout strip, labelled Show 1 more, where 1 bar reads 750.061575846 mmHg.

Is one bar the same as one atmosphere?

No, one bar is about 1.3 percent short of it. A standard atmosphere is defined as exactly 101,325 Pa, so one bar is 0.986923266716 atm and one atmosphere is 1.01325 bar. Put 1.01325 in the From box with bar selected and the answer reads 101,325 Pa, with exactly 1 atm in the list below it. The two units are close enough to swap in casual talk and far enough apart to matter on a calibrated gauge.

How do I convert millibars or hectopascals here?

Divide by a thousand and enter the result as bar, since millibars and hectopascals are not separate entries in this list. One millibar is one hectopascal is 100 pascals, so 0.001 bar reads 100 Pa, and a sea level reading of 1,013.25 mbar is 1.01325 bar, which comes out as 101,325 Pa. Going the other way, divide the pascal answer by 100 to read it in hectopascals.

What is 200 bar in pascals and megapascals?

20,000,000 Pa, which is 20 MPa. Megapascals are not in the list either, so take the pascal figure and divide by a million: 1 bar is 0.1 MPa, 10 bar is 1 MPa, and a 200 bar diving cylinder or hydraulic line is 20 MPa. The same 200 bar also shows as 20,000 kPa, 2,900.7547546 psi and 197.384653343 atm in the list under the answer.

Does it know whether my reading is gauge or absolute?

No, and it does not guess: it changes units and nothing else, so it never adds or removes an atmosphere on your behalf. A tyre gauge showing 2.2 bar is 2.2 bar above the surrounding air, which is 220,000 Pa of gauge pressure, while the same tyre stated absolutely is about 3.21325 bar, or 321,325 Pa. Settle which convention your figure uses before you convert it.

Why does the page open on bar and pascals when I last converted something else?

Because a page that names a pair should show that pair. This one sets bar and pascals on arrival, ahead of whatever the converter last remembered, and it leaves the main unit converter's own memory alone: go back to /unit-converter and it is still on the pair you left it on. The number you last typed does come with you, since it is usually the one you are still working on.