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: Inch Hg = Pascal × 0.0002953
Multiply any pascal value by 0.0002953 to get inch hg.
Reverse: Pascal = Inch Hg × 3386
Common pascal values — factor: 1 Pa = 0.0002953 inHg
| Pascal (Pa) | Inch Hg (inHg) | Context |
|---|---|---|
| 1 Pa | 0.0002953 inHg | 1 Pa — light breeze |
| 100 Pa | 0.02953 inHg | 1 mbar |
| 1,000 Pa | 0.2953 inHg | 10 mbar |
| 1e+04 Pa | 2.953 inHg | 0.1 atm |
| 101,300 Pa | 29.92 inHg | 1 atm / sea level |
| 200,000 Pa | 59.06 inHg | 2 bar |
| 500,000 Pa | 147.6 inHg | 10 bar |
| 1,000,000 Pa | 295.3 inHg | 10 bar |
| 10,000,000 Pa | 2,953 inHg | 100 bar |
| 100,000,000 Pa | 2.953e+04 inHg | 1,000 bar |
| 6,895 Pa | 2.036 inHg | 1 psi |
| 133.3 Pa | 0.03937 inHg | 1 mbar |
| 3,386 Pa | 1 inHg | 1 psi |
| 9.807e+04 Pa | 28.96 inHg | 1 atm / sea level |
| 1.000e+09 Pa | 295,300 inHg | 10,000 bar |
1 Pa = 0.0002953 inHg. Memorize for instant estimates.
Use 0.0002953 as a quick mental multiplier.
Multiply result by 3386 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.
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 pascal 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 Pa = 0.001476 inHg and 10 Pa = 0.002953 inHg. For the reverse: 1 inHg = 3386 Pa. The exact factor is 1 Pa = 0.0002953 inHg.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.