Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 100000 |
| kPa | Kilopascal | 100 |
| atm | Atmosphere | 0.98692327 |
| psi | PSI | 14.503768 |
| Torr | Torr / mmHg | 750.06376 |
| inHg | Inch of Mercury | 29.529971 |
Formula: Pascal = Bar × 1e+05
Multiply any bar value by 1e+05 to get pascal.
Reverse: Bar = Pascal × 1.0000e-5
Common bar values — factor: 1 bar = 1e+05 Pa
| Bar (bar) | Pascal (Pa) | Context |
|---|---|---|
| 0.001 bar | 100 Pa | 0.1 kPa |
| 0.01 bar | 1,000 Pa | 1 kPa |
| 0.1 bar | 1e+04 Pa | 10 kPa |
| 1 bar | 100,000 Pa | 100 kPa / ~1 atm |
| 1.013 bar | 101,300 Pa | 1 standard atm |
| 2 bar | 200,000 Pa | 29 psi / car tire |
| 5 bar | 500,000 Pa | 72 psi |
| 10 bar | 1,000,000 Pa | 145 psi |
| 100 bar | 10,000,000 Pa | 1,450 psi |
| 200 bar | 20,000,000 Pa | Scuba tank |
| 300 bar | 30,000,000 Pa | High-pressure system |
| 500 bar | 50,000,000 Pa | 5,000 psi |
| 1,000 bar | 100,000,000 Pa | 10,000 psi |
| 0.06895 bar | 6,895 Pa | 1 psi |
| 0.001333 bar | 133.3 Pa | 1 mmHg |
1 bar = 1e+05 Pa. Memorize for instant estimates.
Use 1e+05 as a quick mental multiplier.
Multiply result by 1.0000e-5 to recover the original bar value.
Monitors dive cylinder pressure in bar — standard in most of the world (200–300 bar).
Reads surface pressure maps in millibar (1 mbar = 0.001 bar) for weather forecasting.
Designs European hydraulic systems — pumps and actuators are rated in bar.
Controls fermentation vessel pressure (1–3 bar) and carbonation pressures in bar.
Specifies pipeline operating pressures and safety relief settings in bar.
Monitors tire pressure and boost pressure on turbocharged engines in bar.
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.
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.
Converting bar to pascal 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 bar = 5e+05 Pa and 10 bar = 1e+06 Pa. For the reverse: 1 Pa = 1.0000e-5 bar. The exact factor is 1 bar = 1e+05 Pa.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.