Kinematic viscosity
nu = mu / rho
Dynamic viscosity divided by density
Water property lookup
Dynamic Viscosity of Water
Look up dynamic viscosity of water by temperature for pipe flow, pump sizing, pressure drop, and Reynolds number calculations.
Instant lookup
Enter water temperature
Results interpolate dynamic viscosity from the water viscosity table at standard atmospheric pressure.
Lookup result
Reference table
Water dynamic viscosity by temperature
| Temperature (°C) | Dynamic Viscosity (mPa·s) |
|---|---|
| 0 | 1.792 |
| 5 | 1.519 |
| 10 | 1.307 |
| 15 | 1.139 |
| 20 | 1.002 |
| 25 | 0.89 |
| 30 | 0.798 |
| 35 | 0.719 |
| 40 | 0.653 |
| 45 | 0.596 |
| 50 | 0.546 |
| 55 | 0.501 |
| 60 | 0.46 |
| 65 | 0.424 |
| 70 | 0.391 |
| 75 | 0.361 |
| 80 | 0.335 |
| 85 | 0.311 |
| 90 | 0.29 |
| 95 | 0.271 |
| 100 | 0.282 |
Formulas
Useful water property relationships
Sensible heat
Q = m cp Delta T
Heating or cooling energy for liquid water
Dynamic viscosity is used for shear stress, Reynolds number, pressure loss, pump sizing, and CFD or hydraulic model inputs.
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 dynamic viscosity of water at 25 C?
At 25 C, water dynamic viscosity is approximately 0.890 mPa.s.
How does temperature affect water viscosity?
Water viscosity decreases as temperature rises, which lowers resistance to flow and changes Reynolds number.
What is dynamic viscosity used for?
It is used for pressure drop, shear stress, Reynolds number, pump sizing, and fluid flow calculations.
Related
Water property tables
Density of Water
Water density values across practical temperatures.
Kinematic Viscosity of Water
Kinematic 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.