Enter the viscosity at reference temperature, temperature, reference temperature, and viscosity-temperature coefficient into the calculator to determine the viscosity of water.

Viscosity Of Water Formula

The following formula is used to calculate the viscosity of water.

μ = A * (1 - (T/B)) ^ C


  • μ is the viscosity of water (Pa.s) A is the viscosity at reference temperature (Pa.s) T is the temperature (°C) B is the reference temperature (°C) C is the viscosity-temperature coefficient (dimensionless)

To calculate the viscosity of water, subtract the temperature from the reference temperature and divide by the reference temperature. Raise the result to the power of the viscosity-temperature coefficient. Multiply this result by the viscosity at the reference temperature to get the viscosity of water at the given temperature.

What is the Viscosity Of Water?

Viscosity of water refers to the measure of its resistance to gradual deformation by shear or tensile stress. In simpler terms, it is the ‘thickness’ or ‘stickiness’ of the water. The viscosity of water is affected by temperature – it decreases as temperature increases. At 20 degrees Celsius, the viscosity of water is approximately 1.0020 millipascal seconds, a unit that measures dynamic viscosity. This property of water is essential in various fields such as fluid dynamics, engineering, and even in biological systems.

How to Calculate Viscosity Of Water?

The following steps outline how to calculate the Viscosity of Water using the given formula:

  1. First, determine the viscosity at reference temperature (A) in Pa.s.
  2. Next, determine the temperature (T) in °C.
  3. Next, determine the reference temperature (B) in °C.
  4. Next, determine the viscosity-temperature coefficient (C) (dimensionless).
  5. Next, substitute the values of A, T, B, and C into the formula μ = A * (1 – (T/B)) ^ C.
  6. Finally, calculate the viscosity of water (μ) in Pa.s.
  7. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge:

viscosity at reference temperature (A) = 0.001 Pa.s

temperature (T) = 25 °C

reference temperature (B) = 20 °C

viscosity-temperature coefficient (C) = 0.7