Water - Dynamic (Absolute) and Kinematic Viscosity vs. Temperature and Pressure

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.

Online Water Viscosity Calculator

The calculator below can be used to calculate the liquid water dynamic or kinematic viscosity at given temperatures.
The output dynamic viscosity is given as cP, mPa*s, Pa*s, N*s/m²,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 0-370 °C, 32-700 °F, 273-645 K and 492-1160 °R to get valid values.

Temperature

Choose the actual unit of temperature:

°C  °F  K  °R

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See Water and Heavy Water - thermodynamic properties.
See also other properties of Water at varying temperature and pressure: Boiling points at high pressure, Boiling points at vacuum pressure, Density and specific weight, Enthalpy and entropy, Heat of vaporization, Ionization Constant, pK_w, of normal and heavy water, Melting points at high pressure, Prandtl number, Properties at Gas-Liquid Equilibrium Conditions, Saturation pressure, Specific gravity, Specific heat (heat capacity), Specific volume, Thermal conductivity, Thermal diffusivity and Vapour pressure at gas-liquid equilibrium.

See also dynamic and kinematic viscosity of air, ammonia, benzene, butane, carbon dioxide, ethane, ethanol, ethylene, methane, methanol, nitrogen, oxygen and propane.

The figures and tables below shows how water viscosity changes with temperature (°C and °F) at water saturation pressure (which for practicle use, gives the same result as atmospheric pressure at temperatures < 100 °C (212°F)). One figure showing relative viscosity with variations in pressure and temperature is also included.

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Unit conversion

Viscosity Dynamic, Absolute
centipoise [cP], gram/(centimetre second) [g/(cm s)] = poise [P],  kilogram/metre second [kg/m s]=newton second/square metre [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 millimetre/second [mm²/s], square foot/hour [ft²/h], square foot/second [ft²/s], square inch/second [in²/s], square metre/hour [m²/h], square metre/second [m²/s], stoke [St] = square centimetre/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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• Kinematic Viscosity Converter App

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