Pressure · Bar → Pa
Bar to pascal converter and pressure guide
Convert bar to Pa and Pa to bar instantly with formulas, examples, and charts.
Quick bar to pascal conversion
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Core relation between bar and pascal Key formula
1 bar = 100,000 Pa
To convert bar to Pa, multiply bar by 100,000. To convert Pa to bar, divide Pa by 100,000.
Example: 1 bar = 100,000 Pa.
Bar and pascal at a glance
Relative magnitude from 0.1 to 10 bar.
0.1 bar
= 10,000 Pa
0.5 bar
= 50,000 Pa
1 bar
= 100,000 Pa
2 bar
= 200,000 Pa
5 bar
= 500,000 Pa
10 bar
= 1,000,000 Pa
Where bar is often used
- Engineering pressure ranges for pumps, pipes, and compressors.
- Industrial gauges in factory equipment and test benches.
- Everyday uses such as tyre pressure or compressed air lines.
Why Pa is the SI unit
- Pascal fits directly into the SI system as newton per square metre.
- Physics, meteorology, and many standards documents favour Pa or kPa.
- Using Pa helps link pressure with other SI units in calculations.
Popular bar to pascal conversion values
Values are rounded and based on the relation 1 bar = 100,000 Pa (100 kPa).
| Bar | Pascal (Pa) | Kilopascal (kPa) | Megapascal (MPa) |
|---|---|---|---|
| 0.01 bar | 1,000 Pa | 1 kPa | 0.001 MPa |
| 0.05 bar | 5,000 Pa | 5 kPa | 0.005 MPa |
| 0.1 bar | 10,000 Pa | 10 kPa | 0.01 MPa |
| 0.2 bar | 20,000 Pa | 20 kPa | 0.02 MPa |
| 0.5 bar | 50,000 Pa | 50 kPa | 0.05 MPa |
| 1 bar | 100,000 Pa | 100 kPa | 0.1 MPa |
| 2 bar | 200,000 Pa | 200 kPa | 0.2 MPa |
| 3 bar | 300,000 Pa | 300 kPa | 0.3 MPa |
| 5 bar | 500,000 Pa | 500 kPa | 0.5 MPa |
| 10 bar | 1,000,000 Pa | 1,000 kPa | 1 MPa |
| 20 bar | 2,000,000 Pa | 2,000 kPa | 2 MPa |
| 50 bar | 5,000,000 Pa | 5,000 kPa | 5 MPa |
| 100 bar | 10,000,000 Pa | 10,000 kPa | 10 MPa |
Many engineering and reference sites quote the same factor 1 bar = 100,000 Pa and provide similar tables for bar to pascal conversion ranges.[web:19][web:20][web:28]
How to convert bar to pascal
Bar is a metric pressure unit, defined as exactly 100,000 pascals, so the relation is linear and simple to apply.[web:19][web:22][web:24]
Formula from bar to Pa
The definition gives the direct formula:
Pa = bar × 100,000
Example: 2.5 bar × 100,000 = 250,000 Pa (or 250 kPa), which matches typical conversion tables.[web:19][web:23]
Formula from Pa to bar
Rearranging the same relation gives:
bar = Pa ÷ 100,000
For example, 300,000 Pa ÷ 100,000 = 3 bar, which agrees with widely used conversion tables in physics and engineering handbooks.[web:22][web:25]
Step-by-step conversion example
- Write down the starting quantity, for example 3.2 bar.
- Multiply 3.2 by 100,000 to switch from bar to Pa.
- 3.2 × 100,000 = 320,000 Pa.
- If you prefer kPa, divide by 1,000: 320,000 Pa ÷ 1,000 = 320 kPa.
Standard references define the bar as exactly 100,000 newton per square metre, which is 100,000 Pa, making these calculations a direct scale change without extra constants.[web:22][web:24]
Real-world bar and Pa ranges
Bar and pascal appear in physics, engineering, meteorology, and everyday tasks such as checking tyre pressure.[web:22][web:24]
| Context | Approx. pressure in bar | Approx. pressure in Pa | Notes |
|---|---|---|---|
| Standard atmospheric pressure at sea level | ≈ 1.013 bar | ≈ 101,300 Pa | Often rounded to about 1 bar in many charts. |
| Car tyre pressure range | 2 to 3 bar | 200,000 to 300,000 Pa | Typically quoted in bar or psi on labels. |
| Road bike tyre pressure | 5 to 8 bar | 500,000 to 800,000 Pa | High-pressure tyres for reduced rolling resistance. |
| Household water supply | 2 to 5 bar | 200,000 to 500,000 Pa | Varies by region and building height. |
| Deep sea at about 1,000 m | ≈ 100 bar | ≈ 10,000,000 Pa | Hydrostatic pressure grows with depth. |
In many European and scientific contexts, bar and Pa are common, while other regions may prefer psi, so charts often present bar, Pa, kPa, and psi side by side.[web:22][web:24]
Frequently asked questions about bar and Pa
Short answers to typical questions when working with bar to pascal conversion for physics, engineering, and daily tasks.[web:22][web:24]
Is bar an SI unit for pressure?
Bar is not an official SI unit, but it is a metric unit commonly used as 100,000 Pa, especially in industry and meteorology, while the pascal is the SI unit.[web:22][web:24]
Why does atmospheric pressure often appear as 1 bar in charts?
Standard atmospheric pressure at sea level is about 101,325 Pa, which is very close to 1 bar, so many charts and gauges round it to 1 bar for convenience.[web:22][web:24]
How do I switch between Pa, kPa, and MPa?
Divide or multiply by 1,000 between Pa and kPa, and again by 1,000 between kPa and MPa, so 100,000 Pa is 100 kPa or 0.1 MPa.[web:22]
Is 1 bar exactly equal to 100 kPa?
Yes, because 1 bar is defined as exactly 100,000 Pa, which equals exactly 100 kPa, and this definition is used consistently in engineering references.[web:22][web:24]
What is the symbol for pascal and for bar?
The symbol for pascal is Pa and the symbol for bar is bar, although older usage sometimes showed b or mbar, which has largely been replaced by bar and mbar in modern documents.[web:24][web:23]
Unit background and cultural notes
Bar and pascal sit beside other pressure units such as psi and atmosphere, and various regions prefer different units for daily communication.[web:22][web:24]
Origin of the bar unit
The word bar comes from a Greek term meaning weight, and the unit was introduced for meteorology so that pressure maps could use rounded values near 1 bar at sea level.[web:24][web:23]
With the definition 1 bar = 100,000 Pa, the unit provides a convenient scale between atmospheric pressure and typical engineering pressure ranges.[web:22][web:24]
Bar and Pa in different regions
Many European manuals and datasets use bar or Pa, while some regions continue to publish tyre labels or compressor ratings in psi, which encourages multi-unit charts.[web:22][web:24]
Engineers often convert between bar, Pa, kPa, MPa, and psi when comparing international datasheets, so reliable bar to Pa conversion is helpful in cross-border projects.[web:22][web:24]
References
- UnitConverters.net. “Convert Bar to Pascal.” Accessed 2025. https://www.unitconverters.net/pressure/bar-to-pascal.htm
- SensorsONE. “Bar to pascal (Pa) Conversion Table.” Accessed 2025. https://www.sensorsone.com/bar-to-pa-conversion-table/
- Inch Calculator. “Bar to Pascal Conversion.” Accessed 2025. https://www.inchcalculator.com/convert/bar-to-pascal/
- Testbook. “Relation Between Pascal and Bar.” Accessed 2025. https://testbook.com/physics/relation-between-pascal-and-bar
- Wikipedia. “Bar (unit).” Accessed 2025. https://en.wikipedia.org/wiki/Bar_(unit)
- ConvertUnits.com. “Convert bar to pascal.” Accessed 2025. https://www.convertunits.com/from/bar/to/pascal