Convert psi to bar

Content last reviewed:2026-09-30

One psi is 0.0689 bar. Type a pressure in psi and the result in bar appears straight away. The converter divides the value by 14.5038, so a tire inflated to 32 psi has a pressure of 2.2063 bar. The same works for figures from an American manual or gauge.

Pounds per square inch (psi)

psi

Bar

bar

How many bar is 1 psi?

One psi is 0.0689 bar. Multiply the number of psi by 0.0689476, or divide it by 14.5038: bar = psi × 0.0689476[1]. The same formula holds for fractions and negative values.

The formula gives the values you copy from an American manual or a gauge marked in psi. A tire inflated to 32 psi has 2.21 bar. A pressure of 35 psi gives 2.41 bar. A hundred psi is 6.89 bar. The 3,000 psi quoted for scuba cylinders is 206.84 bar.

For a quick estimate in your head, divide the number of psi by 14.5. At 32 psi you get 2.207 bar. The exact result is 2.206 bar. The estimate is 0.026% above the exact result, so up to 50 psi the difference stays under a thousandth of a bar. The converter works from the exact value of psi, 6,894.757 pascals rounded[1], and shows the result to four decimal places.

To turn a pressure in bar into psi, use the bar to psi converter.

What are psi and bar?

Psi describes the pressure produced by a force of one pound-force acting on an area of one square inch[2]. The unit is used primarily in the United States[2].

The value of psi follows from three definitions. The avoirdupois pound is exactly 0.45359237 kilograms[3]. Multiplied by standard gravity, it gives a pound-force of 4.4482216152605 newtons[3]. The third definition is the inch, and a square inch is a square one inch on each side. Dividing the pound-force by a square inch gives 6,894.757 pascals per psi, rounded[1].

The bar is 100,000 pascals[1] and roughly equal to the air pressure at the Earth's surface[4]. It is not an SI unit, but the NIST guide to the SI records that in 1978 the CIPM considered it permissible to keep using it alongside the SI[5].

Silver diving cylinder with a regulator, a blue hose and a pressure gauge lying on stones underwater — A diving cylinder with a regulator and a pressure gauge lies on a stony bottom. The working pressure of an aluminum S80 cylinder is 3,000 psi, which is 206.84 bar. Photo: Niklas Jonasson, Unsplash.

Psi to bar conversion table

The rows run from 1 to 10,000 psi. The values in bar are rounded to three decimal places, and the converter field shows four.

Psi	Bar
1 psi	0.069 bar
5 psi	0.345 bar
10 psi	0.689 bar
14.7 psi	1.014 bar
15 psi	1.034 bar
20 psi	1.379 bar
25 psi	1.724 bar
28 psi	1.931 bar
29 psi	1.999 bar
30 psi	2.068 bar
32 psi	2.206 bar
33 psi	2.275 bar
34 psi	2.344 bar
35 psi	2.413 bar
36 psi	2.482 bar
38 psi	2.62 bar
40 psi	2.758 bar
42 psi	2.896 bar
44 psi	3.034 bar
45 psi	3.103 bar
50 psi	3.447 bar
60 psi	4.137 bar
65 psi	4.482 bar
70 psi	4.826 bar
75 psi	5.171 bar
80 psi	5.516 bar
90 psi	6.205 bar
100 psi	6.895 bar
110 psi	7.584 bar
120 psi	8.274 bar
125 psi	8.618 bar
145 psi	9.997 bar
150 psi	10.342 bar
200 psi	13.79 bar
250 psi	17.237 bar
300 psi	20.684 bar
400 psi	27.579 bar
500 psi	34.474 bar
1,000 psi	68.948 bar
1,500 psi	103.421 bar
2,000 psi	137.895 bar
2,500 psi	172.369 bar
3,000 psi	206.843 bar
3,500 psi	241.317 bar
4,000 psi	275.79 bar
4,500 psi	310.264 bar
5,000 psi	344.738 bar
6,000 psi	413.685 bar
10,000 psi	689.476 bar

Starting from bar instead? Open the bar to psi converter.

How many bar are a 32 psi tire and a 3,000 psi cylinder?

The sources give these pressures in psi. The table turns them into bar and says where each value comes from.

Psi	Bar	Where the value comes from
32 psi	2.206 bar	Typical overpressure in a passenger car tire
36 psi	2.482 bar	Tire pressure on the sample label in the US federal standard FMVSS 110, written as 248 kPa (36 psi)
3,000 psi	206.843 bar	A full scuba tank and the working pressure of an aluminum S80 cylinder
5,000 psi	344.738 bar	H35 hydrogen refueling, also described as 350 bar
10,000 psi	689.476 bar	H70 hydrogen refueling, also described as 700 bar

The article on psi gives 32 psi for a car tire and 3,000 psi for a full scuba tank[2]. The 248 kPa (36 psi) example comes from the axle rating label described in 49 CFR 571.110[6]. The S80 cylinder with a working pressure of 3,000 psi is described in the article on diving cylinders[7]. The Hydrogen Fuel Cell Partnership lists H35 and H70 refueling as 350 bar (5,000 psi) and 700 bar (10,000 psi)[8], so the psi figures there are rounded to whole thousands.

How do you convert psig and psia to barg and bara?

Gauge pressure is measured from the surrounding air pressure, and absolute pressure from a vacuum. The table takes atmospheric pressure as 14.696 psi, which is 1.01325 bar.

Gauge pressure (psig)	Absolute pressure (psia)	Gauge pressure (barg)	Absolute pressure (bara)
0 psig	14.696 psia	0 barg	1.013 bara
30 psig	44.696 psia	2.068 barg	3.082 bara
32 psig	46.696 psia	2.206 barg	3.22 bara
35 psig	49.696 psia	2.413 barg	3.426 bara
100 psig	114.696 psia	6.895 barg	7.908 bara
3,000 psig	3,014.696 psia	206.843 barg	207.856 bara

Psig is measured relative to atmospheric pressure and psia relative to a vacuum[2], so absolute pressure is gauge pressure plus the standard atmosphere of 101,325 Pa, which is 14.696 psi[1]. The suffixes g and a on bar carry the same meaning[9]. The converter works on a number in whatever notation you enter it, so psig becomes barg and psia becomes bara. The psi to atm converter carries a table of the same readings turned into absolute atmospheres.

Which number formats does this converter accept?

The field takes each of these formats and converts it, so you don't need to tidy anything up before pasting. The table shows what the converter does with each one, and the converter itself calculated every result.

What you type	What the converter shows	Note
32	2.2063 bar	A plain number is read as psi, because that's how the field is labeled.
32.5	2.2408 bar	The period is your decimal point, and that's exactly how we read it.
32,5	2.2408 bar	A comma with fewer than three digits after it is a decimal comma from a European document, so the result is the same.
32 psi	2.2063 bar	The unit symbol pasted along with the number is skipped.
32 1/2	2.2408 bar	We work out a slash fraction ourselves, so the mixed number reads as thirty-two and a half psi.
2.2 bar	2.2 bar	The field recognizes bar by its symbol, so the value comes back unchanged.
220 kPa	2.2 bar	Kilopascals are converted too, and 220 kPa is 2.2 bar.
1.500	0.1034 bar	A single period is a decimal point, so we read 1.5 psi. A note under the field says “Read as 1.5. If you meant 1500, type 1500.”
1,500	103.4214 bar	A comma followed by three digits groups thousands, so the field reads fifteen hundred psi. A note under the field says “Read as 1500. If you meant 1.5, type 1.5.”
1 500	103.4214 bar	A space between the thousands is skipped, so this is fifteen hundred psi as well.
-5	-0.3447 bar	A minus sign marks vacuum, a gauge reading below the pressure of the surroundings, and the factor stays the same.
-0.8 bar	-0.8 bar	The minus sign stays when the entry uses a different unit from the field.

How do you convert psi to bar in Excel?

Excel turns psi into kilopascals, and you get bar by dividing that result by a hundred. The steps use a 32 psi tire as the example.

Enter the pressure in psi
Type the number of psi into a cell, for example 32 in cell A2.
Convert psi into kilopascals
The CONVERT function has the syntax CONVERT(number,from_unit,to_unit). Its pressure table lists the codes Pa, atm, mmHg, psi and Torr, and the prefix k can be added to the pascal[10]. You then turn the result in kilopascals into bar with a single division.
Divide the result by 100
A hundred kilopascals make one bar. The formula =CONVERT(A2,"psi","kPa")/100 returns 2.2063 bar for 32 psi.
Copy the formula to the next rows
Once you copy the cell down the column, each row works out bar from its own value in psi.

Convert other units to Bar

kPa to bar

Convert Pounds per square inch (psi) to other units

psi to atm psi to kPa

Sources

NIST Guide to the SI, Appendix B.8: Factors for Units Listed Alphabetically — National Institute of Standards and Technology
Pound per square inch — Wikipedia
Pound (force) — Wikipedia
Bar (Einheit) — Wikipedia
NIST Guide to the SI, Chapter 5: Units Outside the SI — National Institute of Standards and Technology
49 CFR § 571.110, Tire selection and rims and motor home/recreation vehicle trailer load carrying capacity information — Legal Information Institute, Cornell Law School
Diving cylinder — Wikipedia
Gaseous Dispensing — Hydrogen Fuel Cell Partnership (H2FCP)
Bar (unit) — Wikipedia
CONVERT function — Microsoft

Every figure in the tables was computed from the unit definitions and checked arithmetically before publication. Historical values and the names of local units come from the sources listed above.

Content last reviewed: September 30, 2026 · written and checked by the Arteon team

Frequently asked questions about psi and bar

Is 14.7 psi one bar?

A value of 14.7 psi is 1.0135 bar. It roughly matches a standard atmosphere, which is 1.01325 bar[1]. One bar corresponds to 14.5038 psi.

What does psig mean on a gauge?

The g stands for gauge and means the gauge shows pressure measured from atmospheric pressure[2]. A reading of 32 psig converts to 2.2063 barg.

Are psi and lbf/in² the same unit?

Yes. Psi is short for pound per square inch, or more accurately pound-force per square inch, written with the symbol lbf/in²[2].

How many bar is 1 ksi?

A ksi is a thousand psi, or 68.9476 bar. The unit is used mainly in materials science to give tensile strength[2].

Arteon free tool screenshot: Convert psi to bar

Have a question or a suggestion?

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