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

Free online calculator - figures and tables with viscosity of water at temperatures ranging 0 to 360°C (32 to 675°F) - Imperial and SI Units.

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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,lbf*s/ft2 and lbm/(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

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, pKw, 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.

water_viscosity


water_viscosity

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Temperature Pressure Dynamic viscosity Kinematic viscosity
[°C] [MPa] [Pa s], [N s/m2] [cP], [mPa s] [lbf s/ft2 *10-5] [m2/s*10-6], [cSt])
0.01 0.000612 0.0017914 1.79140 3.7414 1.7918
10 0.0012 0.0013060 1.30600 2.7276 1.3065
20 0.0023 0.0010016 1.00160 2.0919 1.0035
25 0.0032 0.0008900 0.89004 1.8589 0.8927
30 0.0042 0.0007972 0.79722 1.6650 0.8007
40 0.0074 0.0006527 0.65272 1.3632 0.6579
50 0.0124 0.0005465 0.54650 1.1414 0.5531
60 0.0199 0.0004660 0.46602 0.9733 0.4740
70 0.0312 0.0004035 0.40353 0.8428 0.4127
80 0.0474 0.0003540 0.35404 0.7394 0.3643
90 0.0702 0.0003142 0.31417 0.6562 0.3255
100 0.101 0.0002816 0.28158 0.5881 0.2938
110 0.143 0.0002546 0.25461 0.5318 0.2677
120 0.199 0.0002320 0.23203 0.4846 0.2460
140 0.362 0.0001966 0.19664 0.4107 0.2123
160 0.618 0.0001704 0.17043 0.3559 0.1878
180 1.00 0.0001504 0.15038 0.3141 0.1695
200 1.55 0.0001346 0.13458 0.2811 0.1556
220 2.32 0.0001218 0.12177 0.2543 0.1449
240 3.35 0.0001111 0.11106 0.2320 0.1365
260 4.69 0.0001018 0.10181 0.2126 0.1299
280 6.42 0.0000936 0.09355 0.1954 0.1247
300 8.59 0.0000859 0.08586 0.1793 0.1206
320 11.3 0.0000783 0.07831 0.1636 0.1174
340 14.6 0.0000703 0.07033 0.1469 0.1152
360 18.7 0.0000603 0.06031 0.1260 0.1143

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Temperature Pressure Dynamic viscosity Kinematic viscosity
[°F] [psi] [lbf s/ft2 *10-5] [lbm/(ft h)] [cP], [mPa s] [ft2/s*10-5]
32.02 0.9506 3.7414 4.3336 1.7914 1.9287
34 0.0962 3.6047 4.1752 1.7259 1.8579
39.2 0.1180 3.2801 3.7992 1.5705 1.6906
40 0.1217 3.2340 3.7458 1.5484 1.6668
50 0.1781 2.7276 3.1593 1.3060 1.4063
60 0.2563 2.3405 2.7109 1.1206 1.2075
70 0.3634 2.0337 2.3556 0.9737 1.0503
80 0.5076 1.7888 2.0719 0.8565 0.9250
90 0.6992 1.5896 1.8411 0.7611 0.8234
100 0.9506 1.4243 1.6497 0.6820 0.7392
110 1.277 1.2847 1.4880 0.6151 0.6682
120 1.695 1.1652 1.3496 0.5579 0.6075
130 2.226 1.0620 1.2300 0.5085 0.5551
140 2.893 0.9733 1.1273 0.4660 0.5102
150 3.723 0.8950 1.0366 0.4285 0.4706
160 4.747 0.8279 0.9589 0.3964 0.4367
170 6.000 0.7698 0.8916 0.3686 0.4074
180 7.520 0.7192 0.8330 0.3444 0.3820
190 9.349 0.6745 0.7813 0.3230 0.3596
200 11.537 0.6300 0.7297 0.3016 0.3371
212 14.710 0.5881 0.6812 0.2816 0.3163
220 17.203 0.5619 0.6508 0.2690 0.3032
240 25.001 0.5050 0.5850 0.2418 0.2750
260 35.263 0.4575 0.5299 0.2191 0.2515
280 49.286 0.4176 0.4837 0.2000 0.2320
300 67.264 0.3840 0.4448 0.1839 0.2157
350 134.73 0.3202 0.3708 0.1533 0.1853
400 247.01 0.2750 0.3185 0.1317 0.1648
450 422.32 0.2404 0.2785 0.1151 0.1504
500 680.56 0.2126 0.2463 0.1018 0.1398
550 1045.0 0.1888 0.2187 0.0904 0.1322
600 1542.1 0.1673 0.1937 0.0801 0.1270
625 1851.2 0.1562 0.1809 0.0748 0.1252
650 2207.8 0.1438 0.1666 0.0689 0.1239
675 2618.7 0.1292 0.1496 0.0619 0.1230

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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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