Convert pressure units — pascal, PSI, bar, atmosphere, torr, mmHg and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 inHg | 3.45316e-05 kgf/cm² | |
| 0.01 inHg | 0.000345316 kgf/cm² | |
| 0.1 inHg | 0.00345316 kgf/cm² | |
| 1 inHg | 0.0345316 kgf/cm² | |
| 5 inHg | 0.172658 kgf/cm² | |
| 10 inHg | 0.345316 kgf/cm² | |
| 50 inHg | 1.72658 kgf/cm² | |
| 100 inHg | 3.45316 kgf/cm² | |
| 1000 inHg | 34.5316 kgf/cm² |
Formula: kgf/cm² = Inch Hg × 0.03453
Multiply any inch hg value by 0.03453 to get kgf/cm².
Reverse: Inch Hg = kgf/cm² × 28.96
Common inch hg values — factor: 1 inHg = 0.03453 kgf/cm²
| Inch Hg (inHg) | kgf/cm² (kgf/cm²) | Context |
|---|---|---|
| 0.01 inHg | 0.0003453 kgf/cm² | Near vacuum |
| 0.1 inHg | 0.003453 kgf/cm² | Very low |
| 1 inHg | 0.03453 kgf/cm² | Low pressure |
| 10 inHg | 0.3453 kgf/cm² | ~10 inHg |
| 20 inHg | 0.6906 kgf/cm² | ~20 inHg |
| 25 inHg | 0.8633 kgf/cm² | Low weather |
| 28 inHg | 0.9669 kgf/cm² | Hurricane center |
| 29 inHg | 1.001 kgf/cm² | Storm low |
| 29.92 inHg | 1.033 kgf/cm² | 1 standard atm |
| 30 inHg | 1.036 kgf/cm² | Slightly high |
| 31 inHg | 1.07 kgf/cm² | High pressure |
| 35 inHg | 1.209 kgf/cm² | Very high |
| 50 inHg | 1.727 kgf/cm² | ~1.67 atm |
| 100 inHg | 3.453 kgf/cm² | ~3.34 atm |
| 1,000 inHg | 34.53 kgf/cm² | ~33.4 atm |
1 inHg = 0.03453 kgf/cm². Memorize for instant estimates.
Use 0.0345 as a quick mental multiplier.
Multiply result by 28.96 to recover the original inHg value.
Sets altimeter QNH and reads weather ATIS in inHg — standard US aviation.
Reports barometric pressure in inHg for US television and radio weather.
Measures duct static pressure in inches of water column or inHg in US systems.
Checks HVAC system static pressure and duct leakage in inHg.
Logs surface pressure in inHg for propagation prediction and wx stations.
References inHg barometric pressure when using US-spec nautical instruments.
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.
Kilograms-force per square centimeter (kgf/cm²) is a traditional metric pressure unit that was widely used in continental Europe and Asia before SI standardization. One kgf/cm² equals approximately 98,066.5 Pa or 0.981 bar.
kgf/cm² remains common in older Japanese, Russian, Chinese, and Indian engineering standards for boiler pressure, hydraulic systems, and material strength specifications. Many legacy industrial gauges still read in kgf/cm².
Interesting fact: 1 kgf/cm² is nearly identical to 1 atm (ratio: 0.968), which is why it was historically used as a convenient engineering approximation for atmospheric pressure in many countries.
Converting inch hg to kgf/cm² 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 inHg = 0.1727 kgf/cm² and 10 inHg = 0.3453 kgf/cm². For the reverse: 1 kgf/cm² = 28.96 inHg. The exact factor is 1 inHg = 0.03453 kgf/cm².
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.