• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
SensorsONE

SensorsONE

  • Products
  • Search
  • Contact

µHg – Micron of Mercury at 0 deg C Pressure Unit

Micron or Micrometre of Mercury is a very small pressure unit which is derived 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.

Featured low pressure measurement products

  • DPS Low Differential Pressure Transmitter DPS Low Differential Pressure Transmitter
  • 60 psi / 4 bar Low Pressure Calibration Pump – ADT912
  • Low Differential Pressure Transmitters DPS300 User Switchable Pressure Range, Volts or Current Output Low DP Sensor
  • DMD341 Compact Differential Air Pressure Sensor

Contents

Toggle
  • Conversion Factors
  • Derivation
      • Formula
      • SI Units
      • Input Values
      • Calculation
  • Alternate Descriptions

Conversion Factors

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

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

Featured low pressure measurement products

  • DCT531P RS485 Modbus RTU Flush Pressure Sensor
  • DMK 458 Seawater Low Range Pressure Transmitter
  • DPS200 HVAC Differential Pressure Transmitter
  • Low Range Voltage Output Pressure Transducers

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 / (Time x Time)

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

Featured low pressure measurement products

  • DMP331P Hygienic Flush Pressure Transmitter
  • Draft Pressure Sensors
  • Low Differential Pressure Transmitters Low Differential Pressure Transmitters
  • +/- 6 psi / 0.4 bar Low Pressure Calibration Pump – ADT901

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

Featured low pressure measurement products

  • IMPLR Low Range All Stainless Steel OEM Pressure Sensor
  • DCT531P RS485 Modbus RTU Flush Pressure Sensor
  • +/- 6 psi / 0.4 bar Low Pressure Calibration Pump – ADT901
  • Low Differential Pressure Transmitters Low Differential Pressure Transmitters

Primary Sidebar

Wirelessly Measure & Log Pressure

Use this battery powered wireless pressure sensor to transmit readings to a receiver connected to USB, RS485, RS232, cellular network or analog output

Use this battery powered wireless pressure sensor to transmit readings to a receiver connected to USB, RS485, RS232, cellular network or analog output

Products

  • Pressure
  • Level
  • Temperature
  • Interfacing
  • Datalogging
  • Calibration
  • Wireless

Product Enquiry

Send us your enquiry for a product associated with this µHg – Micron of Mercury at 0 deg C Pressure Unit page, and get assistance with selecting a product for your application.

Email Your Enquiry

enquiries@sensorsone.com
By clicking "OK" or continuing to use this website you are providing your consent to use cookies as described in our Privacy Policy

© 2025 SensorsONE Ltd, all rights reserved

  • Home
  • Products
  • Tools
  • Legal
  • Contact