Centimeters of Mercury is a small pressure unit which represents the pressure pushing down due to gravity of any volume of liquid mercury which is 1cm high. 1 Centimeter of Mercury at zero degrees Celsius equals 1333.22 Pascals.
The use of cmHg is not as common as mmHg, it is mainly used in applications for measuring pressures of vacuum pumps, pneumatic systems, automotive engine inlet manifold pressures and blood pressure.
For more background on how Mercury is used to measure pressure please vist our mmHg page
Please use the table below to determine the value of 1 Centimeter of Mercury in different pressure units.
For the reverse conversion factor into cmHg please click on the appropriate pressure unit link below.
To calculate cmHg pressure conversions online please go to our pressure converter page.
View the calculation for deriving cmHg from SI units or a list of different ways to identify the cmHg pressure unit.
|135.951||mmH2O 4°C (39.2°F)|
|13.5951||cmH2O 4°C (39.2°F)|
|0.135951||mH2O 4°C (39.2°F)|
|5.35240||inH2O 4°C (39.2°F)|
|0.446033||ftH2O 4°C (39.2°F)|
|10||mmHg 0°C (32°F)|
|1||cmHg 0°C (32°F)|
|0.393701||inHg 0°C (32°F)|
|10000||µHg 0°C (32°F)|
|0.0000863249||tsi (uk, long)|
|0.0000966839||tsi (usa, short)|
|0.0139225||tsf (usa, short)|
Please note that the conversion factors above are accurate to 6 significant figures.
Pressure = Force / Area
Force = Mass x Acceleration
Mass = Density x Volume
Volume = Area x Height
Acceleration = Distance / (Second x Second)
Mass: Kilogram (kg)
Distance: Metre (m)
Time: Second (s)
Force: Newton (N)
Pressure: Pascal (Pa)
Density = Mercury Density at 0degC = 13595.1 kg/m³
Area = 1 m²
Height = 1 cm = 0.01 m
Acceleration = Standard Gravity = 9.80665 m/s²
1 cmHg Mass = 13595.1 kg/m³ x 1 m² x 0.01 m = 135.951 kg
1 cmHg Force = 135.951 kg x 9.80665 m/s² = 1333.223874 N
1 cmHg Pressure = 1333.223874 N / 1 m² = 1333.223874 Pa
These are the different versions used for identifying cmHg that you may find elsewhere.
Centimetres of Mercury
Centimeters of Mercury
Centimetres of Mercury Column
Centimeters of Mercury Column
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