Actual vs Standard Air Density Comparison Calculator
What is Actual vs Standard Air Density Comparison?
This calculator compares the air density at given temperature and pressure (actual conditions) to the standard air density based on ISA (International Standard Atmosphere) conditions.
How to Calculate Actual Air Density
Use the ideal gas law:
ρ = P / (R × T)
Where:
- ρ = Air density (kg/m³)
- P = Pressure in Pascals (Pa)
- R = Specific gas constant for air = 287.058 J/kg·K
- T = Absolute temperature in Kelvin (K)
Standard Air Density (ISA)
Standard air density is typically calculated using:
- Pressure = 101.325 kPa
- Temperature = 15°C or 288.15 K
Why Compare?
Understanding how actual air density deviates from standard helps in HVAC design, aviation performance, and environmental control systems.