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µHg - Micron of Mercury at 0 deg C Pressure Unit

Microns or Micrometres of Mercury is a very small pressure unit which is dervied from the pressure due to gravity that is generated by a 1 micrometer (1/1000mm) column of liquid mercury. 1 Micron of Mercury of Mercury at zero degrees Celsius equals 0.133322 Pascals.

The main use for micrometers of mercury is to measure high vacuum.

The micron of Hg pressure unit is treated as being equal to 1 millitorr, however although the mtorr is a fixed value, the mercury measurement can vary slightly around the world depending what is assumed for the density of mercury and local gravity.

For more information on how Mercury units are derived, please go to our mmHg web page.

Pick a pressure unit conversion factor from the list below for the equivalent value of 1 micron Hg.

Click one one of the units below to find the conversion value to microns of Hg.

Generate many different unit conversions and values of micrometres of Hg using our webpage pressure converter.

View the derivation of µHg from SI units or check a pressure unit against the various ways of describing µHg.



µHg Pressure Conversion Factors


0.00000133322bar
0.0000193368psi
0.00133322mbar
0.133322N/m²
0.133322Pa
0.00133322hPa
0.000133322kPa
0.000000133322MPa
0.00000135951kg/cm²
0.0135951mmH2O 4°C (39.2°F)
0.00135951cmH2O 4°C (39.2°F)
0.0000135951mH2O 4°C (39.2°F)
0.000535240inH2O 4°C (39.2°F)
0.0000446033ftH2O 4°C (39.2°F)
0.001mmHg 0°C (32°F)
0.0001cmHg 0°C (32°F)
0.0000393701inHg 0°C (32°F)
0.001000000Torr
1.000000mTorr
0.00000131579atm
0.00000135951at
1.33322dyn/cm²
0.000309388oz/in²
1µHg 0°C (32°F)
0.00000000863249tsi (uk, long)
0.00000000966839tsi (usa, short)
0.00000139225tsf (usa, short)
0.00278450psf
0.00135951g/cm²

Please note that the conversion factors above are accurate to 6 significant figures.



µHg Derivation
The calculation below shows how the pressure unit Microns of Mercury (µHg) is derived from SI Units.

Formula

Pressure = Force / Area
Force = Mass x Acceleration
Mass = Density x Volume
Volume = Area x Height
Acceleration = Distance / (Second x Second)



SI Units

Mass: Kilogram (kg)
Distance: Metre (m)
Time: Second (s)
Force: Newton (N)
Pressure: Pascal (Pa)



Input Values

Density = Mercury Density at 0degC = 13595.1 kg/m³
Area = 1 m²
Height = 1 µm = 0.000001 m
Acceleration = Standard Gravity = 9.80665 m/s²



Calculation

1 µHg Mass = 13595.1 kg/m³ x 1 m² x 0.000001 m = 0.0135951 kg
1 µHg Force = 0.0135951 kg x 9.80665 m/s² = 0.1333223874 N
1 µHg Pressure = 0.1333223874 N / 1 m² = 0.1333223874 Pa



mmHg Alternate Descriptions

These are the different versions used for identifying mmHg that you may find elsewhere.

Micron of Mercury
Microns of Mercury
Micrometre of Mercury
Millimetres of Mercury
Micrometer of Mercury
Millimeters of Mercury
Micron of Mercury Column
Microns of Mercury Column
Micrometre of Mercury Column
Millimetres of Mercury Column
Micrometer of Mercury Column
Millimeters of Mercury Column
µHg
µ Hg
µmHg
µm Hg
micron Hg
micronHg


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