Water Viscosity Calculator
Calculate dynamic and kinematic viscosity of water at any temperature
Calculate Water Viscosity
Temperature range: 0-100°C for accurate results
Water Viscosity Results
Dynamic Viscosity (η)
Kinematic Viscosity (ν)
Temperature: 20.0°C
Water Density: 0.9983 g/cm³
Formula: ν = η/ρ (Kinematic = Dynamic ÷ Density)
Temperature Analysis
Example Calculation
Room Temperature Water
Temperature: 20°C (68°F)
Dynamic Viscosity: 1.0016 mPa·s
Kinematic Viscosity: 1.0034 mm²/s
Water Density: 0.9982 g/cm³
Calculation Steps
1. Dynamic viscosity calculated using polynomial approximation
2. Water density calculated from temperature
3. Kinematic viscosity = Dynamic viscosity ÷ Density
4. ν = 1.0016 mPa·s ÷ 0.9982 g/cm³ = 1.0034 mm²/s
Types of Viscosity
Dynamic Viscosity
Resistance to flow under applied force
Units: mPa·s, cP, Poise
Kinematic Viscosity
Flow speed under constant force
Units: mm²/s, cSt, Stokes
Reference Values
Viscosity Tips
Higher temperature = lower viscosity
1 mPa·s = 1 cP (centipoise)
1 mm²/s = 1 cSt (centistoke)
Kinematic = Dynamic ÷ Density
Understanding Water Viscosity
What is Viscosity?
Viscosity is a fluid's resistance to flow or deformation. Think of honey versus water - honey has high viscosity (flows slowly), while water has low viscosity (flows easily). Temperature significantly affects viscosity, especially in liquids.
Why Does Temperature Matter?
- •Higher temperature increases molecular motion
- •Faster molecules overcome intermolecular forces easier
- •Result: Lower viscosity at higher temperatures
- •Critical for engineering and scientific applications
Dynamic vs Kinematic Viscosity
Dynamic Viscosity (η)
Measures the force needed to move fluid at a certain velocity
Formula: τ = η × (dv/dy)
Kinematic Viscosity (ν)
Measures how fast fluid flows under its own weight
Formula: ν = η/ρ
Key Insight: Dynamic viscosity depends on intermolecular forces, while kinematic viscosity also accounts for fluid density.
Units Explained
Dynamic Viscosity
• mPa·s (millipascal-seconds)
• cP (centipoise) = mPa·s
• P (poise) = 100 mPa·s
Kinematic Viscosity
• mm²/s (square millimeters per second)
• cSt (centistokes) = mm²/s
• St (stokes) = 100 mm²/s
Applications
- 🔧Engineering: Pump design, pipeline flow calculations
- 🧪Research: Fluid mechanics studies, material testing
- 🏭Industry: Process design, quality control
- 🌡️HVAC: Heat exchanger design, cooling systems