Kinematic viscosity
nu = mu / rho
Dynamic viscosity divided by density
Water property lookup
Kinematic Viscosity of Water
Look up kinematic viscosity of water by temperature for Reynolds number, pipe flow, hydraulic modeling, and CFD inputs.
Instant lookup
Enter water temperature
Results interpolate kinematic viscosity from the water viscosity table at standard atmospheric pressure.
Lookup result
Reference table
Water kinematic viscosity by temperature
| Temperature (°C) | Kinematic Viscosity (10-6 m2/s) | Kinematic Viscosity (cSt) |
|---|---|---|
| 0 | 1.792 | 1.792 |
| 5 | 1.519 | 1.519 |
| 10 | 1.308 | 1.308 |
| 15 | 1.139 | 1.139 |
| 20 | 1.004 | 1.004 |
| 25 | 0.893 | 0.893 |
| 30 | 0.801 | 0.801 |
| 35 | 0.719 | 0.719 |
| 40 | 0.658 | 0.658 |
| 50 | 0.553 | 0.553 |
| 60 | 0.475 | 0.475 |
| 70 | 0.418 | 0.418 |
| 80 | 0.372 | 0.372 |
| 90 | 0.338 | 0.338 |
| 100 | 0.294 | 0.294 |
Formulas
Useful water property relationships
Sensible heat
Q = m cp Delta T
Heating or cooling energy for liquid water
Kinematic viscosity is used for Reynolds number, momentum diffusion, open-channel flow, hydraulic modeling, and fluid machinery calculations.
Reference
What the water property values mean
Density
Mass per unit volume, used for buoyancy, mass flow, hydrostatic pressure, and hydraulic calculations.
Viscosity
Resistance to flow, used for Reynolds number, pressure drop, pump sizing, and pipe flow estimates.
Specific heat
Heat required to raise water temperature, used for heating, cooling, and energy storage calculations.
Vapor pressure
Equilibrium pressure of water vapor, used for boiling, evaporation, cavitation, and phase-change checks.
FAQ
Water property questions
What is the kinematic viscosity of water at 25 C?
At 25 C, water kinematic viscosity is approximately 0.893 cSt, or 0.893 x 10^-6 m2/s.
How is kinematic viscosity related to dynamic viscosity?
Kinematic viscosity equals dynamic viscosity divided by density: nu = mu / rho.
Why is kinematic viscosity useful?
It is commonly used in Reynolds number, hydraulic flow, open-channel flow, and fluid dynamics calculations.
Related
Water property tables
Density of Water
Water density values across practical temperatures.
Dynamic Viscosity of Water
Dynamic viscosity values for water.
Properties of Water at Room Temperature
Reference water properties at 25 deg C.
Properties of Water at Standard Pressure
Water properties at atmospheric pressure.
Specific Heat of Water
Specific heat values for water.