Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| kPa | Kilopascal | 0.001 |
| bar | Bar | 0.00001 |
| atm | Atmosphere | 0.0000098692327 |
| psi | PSI | 0.00014503768 |
| Torr | Torr / mmHg | 0.0075006376 |
| inHg | Inch of Mercury | 0.00029529971 |
Formula: Bar = Pascal × 1.0000e-5
Multiply any pascal value by 1.0000e-5 to get bar.
Reverse: Pascal = Bar × 1e+05
Common pascal values — factor: 1 Pa = 1.0000e-5 bar
| Pascal (Pa) | Bar (bar) | Context |
|---|---|---|
| 1 Pa | 1.000e-05 bar | 1 Pa — light breeze |
| 100 Pa | 0.001 bar | 1 mbar |
| 1,000 Pa | 0.01 bar | 10 mbar |
| 1e+04 Pa | 0.1 bar | 0.1 atm |
| 101,300 Pa | 1.013 bar | 1 atm / sea level |
| 200,000 Pa | 2 bar | 2 bar |
| 500,000 Pa | 5 bar | 10 bar |
| 1,000,000 Pa | 10 bar | 10 bar |
| 10,000,000 Pa | 100 bar | 100 bar |
| 100,000,000 Pa | 1,000 bar | 1,000 bar |
| 6,895 Pa | 0.06895 bar | 1 psi |
| 133.3 Pa | 0.001333 bar | 1 mbar |
| 3,386 Pa | 0.03386 bar | 1 psi |
| 9.807e+04 Pa | 0.9807 bar | 1 atm / sea level |
| 1.000e+09 Pa | 1e+04 bar | 10,000 bar |
1 Pa = 1.0000e-5 bar. Memorize for instant estimates.
Use 1.0000e-5 as a quick mental multiplier.
Multiply result by 1e+05 to recover the original Pa value.
Measures sound pressure levels in pascals — 20 μPa is the threshold of hearing.
Measures wind load on structures and façade pressure in pascals.
Specifies air pressure differentials across filters and dampers in Pa.
Calibrates pressure instruments traceable to SI pascal standards.
Solves Navier-Stokes equations with pressure in pascals.
Controls process chamber pressure in mPa range for deposition processes.
The pascal (Pa) is the SI derived unit of pressure, defined as one newton per square meter. It was named after Blaise Pascal, the 17th-century French mathematician and physicist who studied fluid pressure. The unit was officially adopted by the International System of Units in 1971.
Pascals are used in meteorology (atmospheric pressure ~101,325 Pa), materials science (Young's modulus in GPa), and fluid mechanics. The pascal is very small — standard atmospheric pressure equals 101,325 Pa.
Interesting fact: Blaise Pascal demonstrated in 1648 that atmospheric pressure decreases with altitude by carrying a barometer up the Puy de Dôme mountain, confirming Torricelli's theory of atmospheric pressure.
The bar is a metric unit of pressure equal to exactly 100,000 pascals — very close to standard atmospheric pressure (1 atm = 1.01325 bar). It was introduced in 1909 and is widely used in Europe for weather forecasting, diving, and industrial applications.
Scuba diving cylinders are filled to 200–300 bar. Automotive tire pressure gauges often display in bar across Europe. Industrial compressors and hydraulic systems are commonly rated in bar.
Interesting fact: The millibar (mbar = hPa) is the standard unit for atmospheric pressure in meteorology worldwide. Standard sea-level atmospheric pressure is 1013.25 mbar.
Converting pascal to bar is a common task in engineering, medicine, meteorology, and science. Different industries and countries use different pressure units — PSI in the US, bar in Europe, mmHg in medicine, and pascals in physics — making accurate conversion essential for cross-disciplinary work.
Quick reference: 5 Pa = 5.0000e-5 bar and 10 Pa = 0.0001 bar. For the reverse: 1 bar = 1e+05 Pa. The exact factor is 1 Pa = 1.0000e-5 bar.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.