Convert pressure units — Pascal, bar, PSI, atm, Torr, mmHg.
| Unit | Name | Value |
|---|---|---|
| Pa | Pascal | 1000 |
| bar | Bar | 0.01 |
| atm | Atmosphere | 0.0098692327 |
| psi | PSI | 0.14503768 |
| Torr | Torr / mmHg | 7.5006376 |
| inHg | Inch of Mercury | 0.29529971 |
Formula: Inch Hg = Kilopascal × 0.2953
Multiply any kilopascal value by 0.2953 to get inch hg.
Reverse: Kilopascal = Inch Hg × 3.386
Common kilopascal values — factor: 1 kPa = 0.2953 inHg
| Kilopascal (kPa) | Inch Hg (inHg) | Context |
|---|---|---|
| 0.1 kPa | 0.02953 inHg | Light wind |
| 1 kPa | 0.2953 inHg | 10 mbar |
| 10 kPa | 2.953 inHg | 100 mbar |
| 100 kPa | 29.53 inHg | 1 bar / ~1 atm |
| 101.3 kPa | 29.92 inHg | 1 standard atm |
| 200 kPa | 59.06 inHg | 2 bar / car tire |
| 250 kPa | 73.82 inHg | 2.5 bar tire |
| 500 kPa | 147.6 inHg | 5 bar |
| 1,000 kPa | 295.3 inHg | 10 bar |
| 6.895 kPa | 2.036 inHg | 100 mbar |
| 1e+04 kPa | 2,953 inHg | 100 bar |
| 100,000 kPa | 2.953e+04 inHg | 1,000 bar |
| 0.1333 kPa | 0.03937 inHg | Light wind |
| 3.386 kPa | 0.9999 inHg | 1 inHg |
| 98.07 kPa | 28.96 inHg | 1 kgf/cm² |
kPa × 0.2953 = inHg. Round to × 0.295.
Standard atmosphere.
inHg × 3.386 = kPa.
Specifies tire pressures in kPa on metric-market vehicle tire placards.
Reports blood pressure alongside mmHg in kPa in metric healthcare systems.
Calculates oxygen partial pressure and altitude effects using kPa.
Specifies duct static pressure, fan performance, and filter resistance in Pa/kPa.
Controls vacuum packaging and autoclave sterilization pressures in kPa.
Measures soil pore water pressure and groundwater head in kPa.
The kilopascal (kPa) equals 1,000 pascals and is the practical everyday pressure unit in metric countries. It is the standard unit for tire pressure, blood pressure, and weather maps in countries using SI.
Blood pressure in many countries is expressed in kPa (normal: ~16/10.7 kPa), though mmHg remains dominant in medicine. Car tire pressure is typically 200–250 kPa. Weather maps use hPa (= mbar) for atmospheric pressure.
Interesting fact: The 'bends' (decompression sickness) in scuba diving occurs when dissolved nitrogen forms bubbles as pressure drops — a drop of just a few kPa too quickly can be fatal.
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 kilopascal 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 kPa = 1.476 inHg and 10 kPa = 2.953 inHg. For the reverse: 1 inHg = 3.386 kPa. The exact factor is 1 kPa = 0.2953 inHg.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.