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Ammonia - Dynamic and Kinematic Viscosity vs. Temperature and Pressure

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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.

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

Online Ammonia Gas Viscosity Calculator

The calculator below can be used to calculate dynamic or kinematic viscosity of gaseous ammonia at given temperatures and atmospheric pressure.
The output dynamic viscosity is given as Pa*s, N*s/m 2 , cP, mPa*s, lb f *s/ft 2 and lb m /(ft*h),
while the kinematic viscosity is given as cSt, m 2 /s, and ft 2 /s

Note! Temperature must be within the ranges -33 - 427 °C, -28 - 800 °F, 240 - 700 K and 432-1260 °R to get valid values.

Choose the actual unit of temperature:



See also other properties of Ammonia at varying temperature and pressure: Density and specific weight , Dynamic and kinematic viscosity , Prandtl Number , Properties at Gas-Liquid Equilibrium pressure , Specific Heat (Heat Capacity) and Thermal Conductivity , and Thermophysical properties at standard conditions and Vapour pressure at gas-liquid equilibrium ,
as well as dynamic and kinematic viscosity of air , benzene , butane , carbon dioxide , ethane , ethanol , ethylene , methane , methanol , nitrogen , oxygen , propane and water .

Gaseous ammonia dynamic and kinematic viscosity at atmospheric pressure and varying temperature:


Gaseous ammonia dynamic viscosity at varying temperature and constant pressures (1-1000 bara, 14.5 - 14500 psia):


Liquid ammonia dynamic viscosity at varying temperature and constant pressures (1-1000 bara, 14.5 - 14500 psia):


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




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

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Dynamic (absolute) and kinematic viscosity of ammonia at given temperatures and pressures:

For full table with Dynamic and Kinematic Viscosity - rotate the screen!

Ammonia - Dynamic and Kinematic Viscosity vs. Temperature and Pressure
State Temperature Pressure Dynamic (absolute) viscosity Kinematic vicosity
[K] [°C] [°F] [MPa] [bara] [psia] [μPa s] [cP] [lb f s/ft 2 *10 -6 ] [lb m /ft s*10 -6 ] [lb m /ft h] [cSt],
[m 2 /s*10 -6 ] 		[ft 2 /s*10 -6 ]
Liquid 200 -73.2 -99.7 0.1 1 15 507.7 0.5077 10.60 341.2 1.228 0.6972 7.505
239.6 -33.6 -28.5 0.1 1 15 256.4 0.2564 5.355 172.3 0.6203 0.3758 4.045
Gas 239.6 -33.6 -28.5 0.1 1 15 8.05 0.008046 0.1680 5.407 0.01946 9.156 98.56
300 26.9 80.3 0.1 1 15 10.16 0.010161 0.2122 6.828 0.02458 14.73 158.6
400 127 260 0.1 1 15 13.97 0.013971 0.2918 9.388 0.03380 27.19 292.7
500 227 440 0.1 1 15 17.86 0.017863 0.3731 12.00 0.04321 43.54 468.6
600 327 620 0.1 1 15 21.68 0.021682 0.4528 14.57 0.05245 63.46 683.1
700 427 800 0.1 1 15 25.39 0.025391 0.5303 17.06 0.06142 86.74 933.6
Liquid 200 -73.2 -99.7 1 10 145 509.3 0.5093 10.64 342.2 1.232 0.6991 7.525
298.1 24.9 76.8 1 10 145 131.8 0.1318 2.753 88.58 0.3189 0.2186 2.353
Gas 298.1 24.9 76.8 1 10 145 9.831 0.009831 0.2053 6.606 0.02378 1.256 13.52
300 26.9 80.3 1 10 145 9.912 0.009912 0.2070 6.660 0.02398 1.287 13.85
400 127 260 1 10 145 13.93 0.01393 0.2909 9.359 0.03369 2.625 28.25
500 227 440 1 10 145 17.88 0.01788 0.3734 12.01 0.04325 4.297 46.26
600 327 620 1 10 145 21.72 0.02172 0.4536 14.59 0.05254 6.314 67.96
700 427 800 1 10 145 25.43 0.02543 0.5312 17.09 0.06153 8.642 93.03
Liquid 200 -73.2 -99.7 5 50 725 517.3 0.5173 10.80 347.6 1.251 0.7088 7.630
300 26.9 80.3 5 50 725 132.5 0.1325 2.767 89.03 0.3205 0.2194 2.362
362.0 88.9 192.0 5 50 725 71.29 0.0713 1.489 47.91 0.1725 0.1468 1.581
Gas 362.0 88.9 192 5 50 725 12.48 0.01248 0.2605 8.383 0.03018 0.2950 3.176
400 127 260 5 50 725 14.04 0.01404 0.2931 9.432 0.03395 0.4406 4.742
500 227 440 5 50 725 18.07 0.01807 0.3775 12.14 0.04372 0.8134 8.756
600 327 620 5 50 725 21.94 0.02194 0.4582 14.74 0.05308 1.237 13.31
700 427 800 5 50 725 25.66 0.02566 0.5360 17.24 0.06208 1.721 18.52
Liquid 200 -73.2 -99.7 10 100 1450 527.3 0.5273 11.013 354.3 1.276 0.7209 7.760
300 26.9 80.3 10 100 1450 136.4 0.1364 2.848 91.63 0.3299 0.2242 2.413
398.3 125 257 10 100 1450 43.63 0.043632 0.9113 29.32 0.1055 0.1223 1.317
Gas 398.3 125 257 10 100 1450 17.79 0.01779 0.3716 11.96 0.04304 0.1463 1.575
400 127 260 10 100 1450 17.23 0.01723 0.3599 11.58 0.04168 0.1546 1.664
500 227 440 10 100 1450 18.72 0.01872 0.3910 12.58 0.04529 0.3836 4.129
600 327 620 10 100 1450 22.39 0.02239 0.4677 15.05 0.05417 0.6073 6.537
700 427 800 10 100 1450 26.04 0.02604 0.5438 17.49 0.06298 0.8571 9.226
Liquid 300 26.9 80.3 100 1000 14500 193.7 0.1937 4.046 130.2 0.4686 0.2917 3.140
400 127 260 100 1000 14500 96.24 0.09624 2.010 64.67 0.2328 0.1707 1.837
500 227 440 100 1000 14500 60.39 0.06039 1.261 40.58 0.1461 0.1310 1.410
600 327 620 100 1000 14500 46.19 0.04619 0.9647 31.04 0.1117 0.1260 1.357
700 427 800 100 1000 14500 41.24 0.04124 0.8613 27.71 0.0998 0.1399 1.506

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/m 2 ]= 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)/m 2 = 1 Pa s = 10 P = 1000 cP = 0.672197 lb/(ft s) = 2419.09 lb/(ft h)
  • 1 (N s)/m 2 = 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)/m 2 = 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 [mm 2 /s], square foot/hour [ft 2 /h], square foot/second [ft 2 /s], square inch/second [in 2 /s], square meter/hour [m 2 /h], square meter/second [m 2 /s], stoke [St] = square centimeter/second [cm 2 /s]

  • 1 cm 2 /s = 1 St = 100 mm 2 /s = 100 cSt = 1x10 -4 m 2 /s = 0.36 m 2 /h = 1.07639x10 -3 ft 2 /s = 3.875008 ft 2 /h = 0.1550003 in 2 /s
  • 1 cSt = 1 mm 2 /s = 0.01 St = 1x10 -6 m 2 /s = 0.0036 m 2 /h = 1.07639x10 -5 ft 2 /s = 0.03875008 ft 2 /h = 0.001550003 in 2 /s
  • 1 ft 2 /h = 2.7778x10 -4 ft 2 /s = 0.04 in 2 /s = 2.58064x10 -5 m 2 /s = 0.09290304 m 2 /h = 25.8064 cS = 0.258064 St
  • 1 ft 2 /s = 3600 ft 2 /h = 144 in 2 /s = 0.09290304 m 2 /s = 334.451 m 2 /h = 92903.04 cSt = 929.0304 St
  • 1 in 2 /s = 0.0069444 ft 2 /s = 25 ft 2 /h = 0.00064516 m 2 /s = 2.322576 m 2 /h = 645.16 cSt = 6.4516 St
  • 1 m 2 /h = 1/3600 m 2 /s = 2.7778x10 -4 m 2 /s = 2.7778 cm 2 /s = 277.78 mm 2 /s = 277.78 cSt = 2.7778 St = 0.00298998 ft 2 /s = 10.7639 ft 2 /h = 0.430556 in 2 /s
  • 1 m 2 /s = 3600 m 2 /h = 1x10 4 cm 2 /s = 1x10 4 St = 1x10 6 mm 2 /s = 1x10 6 cSt = 10.7639 ft 2 /s = 38750.08 ft 2 /h = 1550003 in 2 /s
  • 1 mm 2 /s = 1 cSt = 1x10 -6 m 2 /s = 0.0036 m 2 /h = 0.01 cm 2 /s = 0.01 St = 1.07639x10 -5 ft 2 /s = 0.03875008 ft 2 /h = 0.001550003 in 2 /s
  • 1 St = 1 cm 2 /s = 100 cSt = 100 mm 2 /s = 1x10 -4 m 2 /s = 0.36 m 2 /h = 1.076x10 -3 ft 2 /s = 3.875008 ft 2 /h = 0.1550003 in 2 /s

See also Kinematic Viscosity Unit Converter

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