Kinematic viscosity
nu = mu / rho
Dynamic viscosity divided by density
Water property lookup
Density of Water
Look up water density by temperature for hydraulic calculations, buoyancy checks, mass flow estimates, and heat transfer work.
Instant lookup
Enter water temperature
Results interpolate density from the water density table at standard atmospheric pressure.
Lookup result
Reference table
Water density by temperature
| Temperature (°C) | Density (kg/m3) |
|---|---|
| 0 | 999.84 |
| 5 | 999.97 |
| 10 | 999.7 |
| 15 | 999.1 |
| 20 | 998.21 |
| 25 | 997.05 |
| 30 | 995.65 |
| 35 | 994.03 |
| 40 | 992.22 |
| 45 | 990.21 |
| 50 | 988.07 |
| 55 | 985.73 |
| 60 | 983.24 |
| 65 | 980.63 |
| 70 | 977.81 |
| 75 | 974.87 |
| 80 | 971.8 |
| 85 | 968.6 |
| 90 | 965.3 |
| 95 | 961.89 |
| 100 | 958.35 |
Formulas
Useful water property relationships
Sensible heat
Q = m cp Delta T
Heating or cooling energy for liquid water
Water density is used for mass flow, buoyancy, hydrostatic pressure, pump calculations, and temperature-dependent fluid property estimates.
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 density of water at 25 C?
At 25 C and atmospheric pressure, water density is approximately 997.05 kg/m3.
Does water density decrease with temperature?
For the practical liquid range shown here, water density generally decreases as temperature increases.
Can this table replace laboratory data?
Use it for quick engineering reference and early calculations. Final design work should use validated data for the exact pressure, purity, and temperature range.
Related
Water property tables
Dynamic Viscosity of Water
Dynamic viscosity values for water.
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.