EngiRef / Reference Constant

Density of Water (20°C)

Density of Water (20°C) (ρ_water) = 998.2 kg/m³. Fresh water density at 20°C and 1 atm. A reference constant in the free EngiRef reference, with 27 more…

referenceρ_water

Specification

Name
Density of Water (20°C)
Symbol
ρ_water
Value
998.2
Unit
kg/m³
Category
reference
Description
Fresh water density at 20°C and 1 atm.

Constants

Related constants

Scientific constants

Density of Air (ISA sea level)

Dry air at 15°C and 101.325 kPa (ISA sea level). Note this is the ISA reference condition, not STP; dry air at 0°C and 101.325 kPa is 1.2754 kg/m³.

referenceρ_air

Specific Heat of Water

Specific heat capacity of liquid water near 15°C (the calorie-defining condition). At 25°C the value is about 4180 J/(kg·K).

referencecₚ

Dynamic Viscosity of Water (20°C)

Dynamic viscosity of water at 20°C.

referenceμ_water

Dynamic Viscosity of Air (20°C)

Dynamic viscosity of air at 20°C and 1 atm.

referenceμ_air

Speed of Light in Vacuum

Exact defined value in SI. Maximum speed in universe.

fundamentalc

Planck Constant

Exact defined value in SI. Relates photon energy to frequency.

fundamentalh