Air - Dynamic and Kinematic Viscosity

The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.

For further definitions, go to Absolute (dynamic) and kinematic viscosity.  Absolute or dynamic viscosity is used to calculate Reynold's Number to determine if a fluid flow is laminar, transient or turbulent.

Tabulated values and viscosity units conversion are given below the figures.

Online Air Viscosity Calculator

The calculator below can be used to calculate air dynamic or kinematic viscosity at given temperatures and atmospheric pressure.
The output dynamic viscosity is given as Pa*s, N*s/m², cP, mPa*s, lb_f*s/ft² and lb_m/(ft*h),
while the kinematic viscosity is given as cSt, m²/s, and ft²/s

Note! Temperature must be within the ranges -100 - 1600 °C, -150 - 2900 °F, 175 - 1900 K and 310-3400 °R to get valid values.

Temperature

Choose the actual unit of temperature:

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See also other properties of Air at varying temperature and pressure: Density and specific weight at varying temperature, Density at varying pressure, Diffusion Coefficients for Gases in Air, Prandtl Number, Specific heat at varying temperature and Specific heat at varying pressure, Thermal Conductivity, Thermal Diffusivity, Properties at gas-liquid equilibrium conditions and Air thermophysical properties at standard conditions and Composition and molecular weight,
as well as dynamic and kinematic viscosity of ammonia, benzene, butane,  carbon dioxide, ethane, ethanol, ethylene, methane, methanol, nitrogen, oxygen, propane and water.

Air dynamic and kinematic viscosity at atmospheric pressure and varying temperature:

• Absolute or Dynamic Viscosity Online Converter

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Air dynamic viscosity at varying temperature and constant pressures (1-10 000 bara, 14.5 - 145 000 psia):

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Air kinematic viscosity at varying temperature and constant pressures (1-10 000 bara, 14.5 - 145 000 psia):




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Air dynamic and kinematic viscosity at gas-liquid equilibrium pressure:

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Dynamic (absolute) and kinematic viscosity of air at 1 atmosphere pressure, at temperatures given as °F:

For full table with kinematic viscosity - rotate the screen!

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Dynamic (absolute) and kinematic viscosity of air at 1 atmosphere pressure, at temperatures given as °C:

For full table with kinematic viscosity - rotate the screen!

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Unit conversion:

Viscosity Dynamic, Absolute
centipoise [cP], gram/(centimeter second) [g/(cm s)] = poise [P],  kilogram/meter second [kg/m s]=newton second/square meter [N s/m²]= pascal second [Pa s], pound/(foot hour) [lb/(ft h)], pound/(foot second) [lb/(ft s)], reyn [reyn]

• 1 cP = 0.001 Pa s = 0.01 P = = 0.01 g/(cm sec) = 6.72197x10^-4 lb/(ft s) = 2.4191 lb/(ft h)  
• 1 lb/(ft h) = 0.00027778 lb/(ft s) = 0.00041338 Pa s = 0.0041338 P = 0.41338 cP       
• 1 lb/(ft s) = 3600 lb/(ft h) = 1.48816 Pa s = 14.8816 P = 1488.16 cP             
• 1 kg/(m s ) = 1 (N s)/m² = 1 Pa s = 10 P = 1000 cP = 0.672197 lb/(ft s) = 2419.09 lb/(ft h)
• 1 (N s)/m² = 1 kg/(m s ) = 1 Pa s = 10 P = 1000 cP = 0.672197 lb/(ft s) = 2419.09 lb/(ft h)
• 1 P = 1 g/(cm s) = 0.1 Pa s = 100 cP = 0.067197 lb/(ft s) = 241.909 lb/(ft h)                      
• 1 Pa s = 1 kg/(m s) = 1 (N s)/m² = 10 P = 1000 cP = 0.672197 lb/(ft s) = 2419.08 lb/(ft h) =  0.00014504 reyn     
• 1 reyn = 6894.76 Pa s

See also Absolute or Dynamic Viscosity Unit Converter

Viscosity Kinematic
centistoke [cSt] = square millimeter/second [mm²/s], square foot/hour [ft²/h], square foot/second [ft²/s], square inch/second [in²/s], square meter/hour [m²/h], square meter/second [m²/s], stoke [St] = square centimeter/second [cm²/s]

• 1 cm²/s = 1 St = 100 mm²/s = 100 cSt = 1x10^-4 m²/s = 0.36 m²/h = 1.07639x10^-3 ft²/s = 3.875008 ft²/h = 0.1550003 in²/s
• 1 cSt = 1 mm²/s = 0.01 St = 1x10^-6 m²/s = 0.0036 m²/h = 1.07639x10^-5 ft²/s = 0.03875008 ft²/h = 0.001550003 in²/s
• 1 ft²/h = 2.7778x10^-4 ft²/s = 0.04 in²/s = 2.58064x10^-5 m²/s = 0.09290304 m²/h = 25.8064 cS = 0.258064 St
• 1 ft²/s = 3600 ft²/h = 144 in²/s = 0.09290304 m²/s = 334.451 m²/h = 92903.04 cSt = 929.0304 St
• 1 in²/s = 0.0069444 ft²/s = 25 ft²/h = 0.00064516 m²/s = 2.322576 m²/h = 645.16 cSt = 6.4516 St
• 1 m²/h = 1/3600 m²/s = 2.7778x10^-4 m²/s = 2.7778 cm²/s = 277.78 mm²/s = 277.78 cSt = 2.7778 St = 0.00298998 ft²/s = 10.7639 ft²/h = 0.430556 in²/s
• 1 m²/s = 3600 m²/h = 1x10⁴ cm²/s = 1x10⁴ St = 1x10⁶ mm²/s = 1x10⁶ cSt = 10.7639 ft²/s = 38750.08 ft²/h = 1550003 in²/s
• 1 mm²/s = 1 cSt = 1x10^-6 m²/s = 0.0036 m²/h = 0.01 cm²/s = 0.01 St = 1.07639x10^-5 ft²/s = 0.03875008 ft²/h = 0.001550003 in²/s
• 1 St = 1 cm²/s = 100 cSt = 100 mm²/s = 1x10^-4 m²/s = 0.36 m²/h = 1.076x10^-3 ft²/s = 3.875008 ft²/h = 0.1550003 in²/s

See also Kinematic Viscosity Unit Converter

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