Inch of mercury column (inHg) - Pressure Unit - Definition, Application, Conversions

What is an inch of mercury column (inHg)?

An inch of mercury column is a unit of pressure used mainly in the United States and other countries using the imperial measurement system. One inch of mercury column is defined as the pressure exerted by a column of mercury one inch high at standard earth acceleration. The unit designation for an inch of mercury column is inHg.

The inch of mercury column is particularly useful in specialised applications due to its historical significance and precision of measurement.

Inch of mercury column has limited application in industrial hoses compared to bars or PSI. Industrial hoses, especially those designed for high pressures, require units better suited for higher working pressures.

When is an inch of mercury column used to measure pressure?

The inch of mercury column is used to measure pressure primarily in countries using the imperial measurement system. The main uses of this unit are:

• Meteorology - In the United States, inHg is the standard unit used to measure atmospheric pressure. It is crucial for weather forecasting, monitoring weather systems and climate research. 
• Aviation - The inHg is used to calibrate altimeters and other measuring instruments in aircraft. Accurate measurements of atmospheric pressure are essential for flight safety and navigation. 
• Medicine - Although less common than mmHg, inHg can be used in medicine, such as in certain types of medical equipment to measure pressure. 
• Science and research - In some specialised scientific research, particularly in physics and engineering, inHg can be used to measure pressure under controlled experimental conditions.

How to measure pressure in inches of mercury?

To measure pressure in inches of mercury (inHg), you need the right measuring equipment, such as a mercury manometer, which measures pressure in this unit.

Here are the steps to take to measure pressure in inches of mercury (inHg):

1. Choose the right manometer - The most classic device for measuring pressure in inches of mercury is a mercury manometer, which consists of a glass tube filled with mercury. Alternatively, you can use a digital manometer calibrated to measure in inches of mercury (inHg).
2. Identify the measuring point - Determine the place where you want to measure the pressure (e.g. atmospheric pressure, pressure in a vacuum system).
3. Connect the manometer - If you are using a digital manometer, connect it to the measuring point. Make sure that the connection is tight. In the case of a traditional mercury manometer, the device should be placed vertically and the system open to the pressure you want to measure.
4. Read the result - In a mercury manometer, the reading is obtained by observing the level of mercury in a glass tube. It indicates the pressure in inches of mercury. In a digital manometer, the reading will appear directly on the display in inHg.

If you have a device that measures pressure in other pressure units, you can convert the pressure to inches of mercury using the appropriate pressure converters.

Conversion of the pressure unit inch of mercury column (inHg)

• 1 inHg = 0,0334211 bar
• 1 inHg = 3386,39 Pa
• 1 inHg = 33,8639 hPa
• 1 inHg = 3,38639 kPa
• 1 inHg = 0,00338639 MPa
• 1 inHg = 0,0334211 atm
• 1 inHg = 0,491154 PSI
• 1 inHg = 345,315 mmH2O
• 1 inHg = 13,5951 inH2O
• 1 inHg = 25,4 mmHg
• 1 inHg = 25,4 Tr
• 1 inHg = 70,307 PSF
• 1 inHg = 0,034532 at
  

1 inch of mercury column (inHg) = 0,0334211 bar = 3386,39 Pa = 33,8639 hPa = 3,38639 kPa = 0,00338639 MPa = 0,0334211 atm = 0,491154 PSI = 345,315 mmH2O = 13,5951 inH2O = 25,4 mmHg = 25,4 Tr = 70,307 PSF = 0,034532 at

inHg to Bar - Inch of mercury column to Bar pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Bar multiply the pressure in Inch of mercury column (inHg) by 0,0334211.

• 1 inHg to bar? 1 inHg is equal to 0,0334211 bar
• 2 inHg to bar? 2 inHg is equal to 0,0668422 bar
• 5 inHg to bar? 5 inHg is equal to 0,1671055 bar
• 10 inHg to bar? 10 inHg is equal to 0,334211 bar
• 20 inHg to bar? 20 inHg is equal to 0,668422 bar
• 50 inHg to bar? 50 inHg is equal to 1,671055 bar
• 100 inHg to bar? 100 inHg is equal to 3,34211 bar
• 200 inHg to bar? 200 inHg is equal to 6,68422 bar
• 500 inHg to bar? 500 inHg is equal to 16,71055 bar
• 1000 inHg to bar? 1000 inHg is equal to 33,4211 bar

inHg to Pa - Inch of mercury column to Pascal pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Pascal (Pa) multiply the pressure in Inch of mercury column (inHg) by 3386,39.

• 1 inHg to Pa? 1 inHg is equal to 3386,39 Pa
• 2 inHg to Pa? 2 inHg is equal to 6772,78 Pa
• 5 inHg to Pa? 5 inHg is equal to 16931,95 Pa
• 10 inHg to Pa? 10 inHg is equal to 33863,9 Pa
• 20 inHg to Pa? 20 inHg is equal to 67727,8 Pa
• 50 inHg to Pa? 50 inHg is equal to 169319,5 Pa
• 100 inHg to Pa? 100 inHg is equal to 338639 Pa
• 200 inHg to Pa? 200 inHg is equal to 677278 Pa
• 500 inHg to Pa? 500 inHg is equal to 1693195 Pa
• 1000 inHg to Pa? 1000 inHg is equal to 3386390 Pa

inHg to hPa - Inch of mercury column to Hectopascal pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Hectopascal (hPa) multiply the pressure in Inch of mercury column (inHg) by 33,8639.

• 1 inHg to hPa? 1 inHg is equal to 33,8639 hPa
• 2 inHg to hPa? 2 inHg is equal to 67,7278 hPa
• 5 inHg to hPa? 5 inHg is equal to 169,3195 hPa
• 10 inHg to hPa? 10 inHg is equal to 338,639 hPa
• 20 inHg to hPa? 20 inHg is equal to 677,278 hPa
• 50 inHg to hPa? 50 inHg is equal to 1693,195 hPa
• 100 inHg to hPa? 100 inHg is equal to 3386,39 hPa
• 200 inHg to hPa? 200 inHg is equal to 6772,78 hPa
• 500 inHg to hPa? 500 inHg is equal to 16931,95 hPa
• 1000 inHg to hPa? 1000 inHg is equal to 33863,9 hPa

inHg to kPa - Inch of mercury column to Kilopascal pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Kilopascal (kPa) multiply the pressure in Inch of mercury column (inHg) by 3,38639.

• 1 inHg to kPa? 1 inHg is equal to 3,38639 kPa
• 2 inHg to kPa? 2 inHg is equal to 6,77278 kPa
• 5 inHg to kPa? 5 inHg is equal to 16,93195 kPa
• 10 inHg to kPa? 10 inHg is equal to 33,8639 kPa
• 20 inHg to kPa? 20 inHg is equal to 67,7278 kPa
• 50 inHg to kPa? 50 inHg is equal to 169,3195 kPa
• 100 inHg to kPa? 100 inHg is equal to 338,639 kPa
• 200 inHg to kPa? 200 inHg is equal to 677,278 kPa
• 500 inHg to kPa? 500 inHg is equal to 1693,195 kPa
• 1000 inHg to kPa? 1000 inHg is equal to 3386,39 kPa

inHg to MPa - Inch of mercury column to Megapascal pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Megapascal (MPa) multiply the pressure in Inch of mercury column (inHg) by 0,00338639.

• 1 inHg to MPa? 1 inHg is equal to 0,00338639 MPa
• 2 inHg to MPa? 2 inHg is equal to 0,00677278 MPa
• 5 inHg to MPa? 5 inHg is equal to 0,01693195 MPa
• 10 inHg to MPa? 10 inHg is equal to 0,0338639 MPa
• 20 inHg to MPa? 20 inHg is equal to 0,0677278 MPa
• 50 inHg to MPa? 50 inHg is equal to 0,1693195 MPa
• 100 inHg to MPa? 100 inHg is equal to 0,338639 MPa
• 200 inHg to MPa? 200 inHg is equal to 0,677278 MPa
• 500 inHg to MPa? 500 inHg is equal to 1,693195 MPa
• 1000 inHg to MPa? 1000 inHg is equal to 3,38639 MPa

inHg to atm - Inch of mercury column to Atmosphere pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Atmosphere (atm) multiply the pressure in Inch of mercury column (inHg) by 0,0334211.

• 1 inHg to atm? 1 inHg is equal to 0,0334211 atm
• 2 inHg to atm? 2 inHg is equal to 0,0668422 atm
• 5 inHg to atm? 5 inHg is equal to 0,1671055 atm
• 10 inHg to atm? 10 inHg is equal to 0,334211 atm
• 20 inHg to atm? 20 inHg is equal to 0,668422 atm
• 50 inHg to atm? 50 inHg is equal to 1,671055 atm
• 100 inHg to atm? 100 inHg is equal to 3,34211 atm
• 200 inHg to atm? 200 inHg is equal to 6,68422 atm
• 500 inHg to atm? 500 inHg is equal to 16,71055 atm
• 1000 inHg to atm? 1000 inHg is equal to 33,4211 atm

inHg to PSI - Inch of mercury column to PSI pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to PSI multiply the pressure in Inch of mercury column (inHg) by 0,491154.

• 1 inHg to PSI? 1 inHg is equal to 0,491154 PSI
• 2 inHg to PSI? 2 inHg is equal to 0,982308 PSI
• 5 inHg to PSI? 5 inHg is equal to 2,45577 PSI
• 10 inHg to PSI? 10 inHg is equal to 4,91154 PSI
• 20 inHg to PSI? 20 inHg is equal to 9,82308 PSI
• 29,8 inHg to PSI? 29,8 inHg is equal to 14,6363892 PSI
• 30 inHg to PSI? 30 inHg is equal to 14,73462 PSI
• 40 inHg to PSI? 40 inHg is equal to 19,64616 PSI
• 50 inHg to PSI? 50 inHg is equal to 24,5577 PSI
• 100 inHg to PSI? 100 inHg is equal to 49,1154 PSI
• 200 inHg to PSI? 200 inHg is equal to 98,2308 PSI
• 500 inHg to PSI? 500 inHg is equal to 245,577 PSI
• 1000 inHg to PSI? 1000 inHg is equal to 491,154 PSI

inHg to mmH2O - Inch of mercury column to Milimetre of water column pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Milimetre of water column (mmH2O) multiply the pressure in Inch of mercury column (inHg) by 345,315.

• 1 inHg to mmH2O? 1 inHg is equal to 345,315 mmH2O
• 2 inHg to mmH2O? 2 inHg is equal to 690,63 mmH2O
• 5 inHg to mmH2O? 5 inHg is equal to 1726,575 mmH2O
• 10 inHg to mmH2O? 10 inHg is equal to 3453,15 mmH2O
• 20 inHg to mmH2O? 20 inHg is equal to 6906,3 mmH2O
• 50 inHg to mmH2O? 50 inHg is equal to 17265,75 mmH2O
• 100 inHg to mmH2O? 100 inHg is equal to 34531,5 mmH2O
• 200 inHg to mmH2O? 200 inHg is equal to 69063 mmH2O
• 500 inHg to mmH2O? 500 inHg is equal to 172657,5 mmH2O
• 1000 inHg to mmH2O? 1000 inHg is equal to 345315 mmH2O

inHg to inH2O - Inch of mercury column to Inch of water column pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Inch of water column (inH2O) multiply the pressure in Inch of mercury column (inHg) by 13,5951.

• 1 inHg to inH2O? 1 inHg is equal to 13,5951 inH2O
• 2 inHg to inH2O? 2 inHg is equal to 27,1902 inH2O
• 5 inHg to inH2O? 5 inHg is equal to 67,9755 inH2O
• 10 inHg to inH2O? 10 inHg is equal to 135,951 inH2O
• 20 inHg to inH2O? 20 inHg is equal to 271,902 inH2O
• 50 inHg to inH2O? 50 inHg is equal to 679,755 inH2O
• 100 inHg to inH2O? 100 inHg is equal to 1359,51 inH2O
• 200 inHg to inH2O? 200 inHg is equal to 2719,02 inH2O
• 500 inHg to inH2O? 500 inHg is equal to 6797,55 inH2O
• 1000 inHg to inH2O? 1000 inHg is equal to 13595,1 inH2O

inHg to torr - Inch of mercury column to torr pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to torr (Tr) multiply the pressure in Inch of mercury column (inHg) by 25,4.

• 1 inHg to torr? 1 inHg is equal to 25,4 torr
• 2 inHg to torr? 2 inHg is equal to 50,8 torr
• 5 inHg to torr? 5 inHg is equal to 127 torr
• 10 inHg to torr? 10 inHg is equal to 254 torr
• 20 inHg to torr? 20 inHg is equal to 508 torr
• 50 inHg to torr? 50 inHg is equal to 1270 torr
• 100 inHg to torr? 100 inHg is equal to 2540 torr
• 200 inHg to torr? 200 inHg is equal to 5080 torr
• 500 inHg to torr? 500 inHg is equal to 12700 torr
• 1000 inHg to torr? 1000 inHg is equal to 25400 torr

inHg to mmHg - Inch of mercury column to Milimetre of mercury column pressure unit conversion

To convert pressure from Inch of mercury column (inHg) to Milimetre of mercury column (mmHg) multiply the pressure in Inch of mercury column (inHg) by 25,4.

• 1 inHg to mmHg? 1 inHg is equal to 25,4 mmHg
• 2 inHg to mmHg? 2 inHg is equal to 50,8 mmHg
• 5 inHg to mmHg? 5 inHg is equal to 127 mmHg
• 10 inHg to mmHg? 10 inHg is equal to 254 mmHg
• 20 inHg to mmHg? 20 inHg is equal to 508 mmHg
• 29,91 inHg to mmHg? 29,91 inHg is equal to 759,714 mmHg
• 30,04 inHg to mmHg? 30,04 inHg is equal to 763,016 mmHg
• 30,06 inHg to mmHg? 30,06 inHg is equal to 763,524 mmHg
• 40 inHg to mmHg? 40 inHg is equal to 1016 mmHg
• 50 inHg to mmHg? 50 inHg is equal to 1270 mmHg
• 100 inHg to mmHg? 100 inHg is equal to 2540 mmHg
• 200 inHg to mmHg? 200 inHg is equal to 5080 mmHg
• 500 inHg to mmHg? 500 inHg is equal to 12700 mmHg
• 1000 inHg to mmHg? 1000 inHg is equal to 25400 mmHg

inHg to PSF - Inch of mercury column to PSF pressure unit conversion

To convert pressure from the Inch of mercury column (inHg) to PSF multiply the pressure in Inch of mercury column (inHg) by 70,307.

• 1 inHg to PSF? 1 inHg is equal to 70,307 PSF
• 2 inHg to PSF? 2 inHg is equal to 140,614 PSF
• 5 inHg to PSF? 5 inHg is equal to 351,535 PSF
• 10 inHg to PSF? 10 inHg is equal to 703,07 PSF
• 20 inHg to PSF? 20 inHg is equal to 1406,14 PSF
• 50 inHg to PSF? 50 inHg is equal to 3515,35 PSF
• 100 inHg to PSF? 100 inHg is equal to 7030,7 PSF
• 200 inHg to PSF? 200 inHg is equal to 14061,4 PSF
• 500 inHg to PSF? 500 inHg is equal to 35153,5 PSF
• 1000 inHg to PSF? 1000 inHg is equal to 70307 PSF

inHg to at - Inch of mercury column to Technical atmosphere pressure unit conversion

To convert pressure from the Inch of mercury column (inHg) to the Technical Atmosphere (at) multiply the pressure in the Inch of mercury column (inHg) by 0,034532.

• 1 inHg to at? 1 inHg is equal to 0,034532 at
• 2 inHg to at? 2 inHg is equal to 0,069064 at
• 5 inHg to at? 5 inHg is equal to 0,17266 at
• 10 inHg to at? 10 inHg is equal to 0,34532 at
• 20 inHg to at? 20 inHg is equal to 0,69064 at
• 50 inHg to at? 50 inHg is equal to 1,7266 at
• 100 inHg to at? 100 inHg is equal to 3,4532 at
• 200 inHg to at? 200 inHg is equal to 6,9064 at
• 500 inHg to at? 500 inHg is equal to 17,266 at
• 1000 inHg to at? 1000 inHg is equal to 34,532 at