# Air Density Calculator

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Unit Converter

Enter the air pressure, water vapor pressure, and air temperature into the air density calculator. The calculator will display the current air density at those conditions.

## Air Density Formula

The following formula is used to calculate air density.

ρ = (pd / (Rd * T)) + (pv / (Rv * T))

where:

• pd is the pressure of dry air in Pa,
• pv is the water vapor pressure in Pa,
• T is the air temperature in Kelvins,
• Rd is the specific gas constant for dry air equal to 287.058 J/(kg·K), and
• Rv is the specific gas constant for water vapor equal to 461.495 J/(kg·K).

## Air Density Definition

Air density is the density of air in any specific temperature and pressure.

## How to calculate air density?

• 1.First, determine the pressure of dry air
• This can be calculated using a formula or using a table for air pressure at certain temperatures.
• 2.Next, determine the water vapor pressure
• This is dependent on the relative humidity.
• 3.Measure the air temperature
• Measure the air temperature and convert it to Kelvin.
• 4.Calculate the air density
• Calculate the air density using the formula above.

## FAQ

What is air density?

Air density is the total mass of air within a given volume.

How can air density change?

Air density can change with temperature and pressure. Increasing pressure and temperature both increase density because they are forcing more air into a smaller volume.