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: Inch Hg = Bar × 29.53
Multiply any bar value by 29.53 to get inch hg.
Reverse: Bar = Inch Hg × 0.03386
Common bar values — factor: 1 bar = 29.53 inHg
| Bar (bar) | Inch Hg (inHg) | Context |
|---|---|---|
| 0.001 bar | 0.02953 inHg | 0.1 kPa |
| 0.01 bar | 0.2953 inHg | 1 kPa |
| 0.1 bar | 2.953 inHg | 10 kPa |
| 1 bar | 29.53 inHg | 100 kPa / ~1 atm |
| 1.013 bar | 29.92 inHg | 1 standard atm |
| 2 bar | 59.06 inHg | 29 psi / car tire |
| 5 bar | 147.6 inHg | 72 psi |
| 10 bar | 295.3 inHg | 145 psi |
| 100 bar | 2,953 inHg | 1,450 psi |
| 200 bar | 5,906 inHg | Scuba tank |
| 300 bar | 8,859 inHg | High-pressure system |
| 500 bar | 1.476e+04 inHg | 5,000 psi |
| 1,000 bar | 2.953e+04 inHg | 10,000 psi |
| 0.06895 bar | 2.036 inHg | 1 psi |
| 0.001333 bar | 0.03936 inHg | 1 mmHg |
1 bar = 29.53 inHg. Memorize for instant estimates.
Use 29.53 as a quick mental multiplier.
Multiply result by 0.03386 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.
Inches of mercury (inHg) is the pressure unit used in US aviation and weather reporting, defined as the pressure exerted by a 1-inch column of mercury (3,386.39 Pa). It has been standard in US aviation since the early 20th century.
US aviation altimeters are set in inHg (standard: 29.92 inHg). US weather broadcasts report barometric pressure in inHg. HVAC engineers in the US use inHg for duct static pressure measurements.
Interesting fact: Pilots set their altimeter to the local QNH (pressure at sea level) in inHg to ensure their altitude reading is accurate — a difference of 0.1 inHg causes an altimeter error of about 100 feet.
Converting bar to inch hg 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 = 147.6 inHg and 10 bar = 295.3 inHg. For the reverse: 1 inHg = 0.03386 bar. The exact factor is 1 bar = 29.53 inHg.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.