Calculate the weight of air in kg or lb from its volume at standard sea-level conditions, or enter your own temperature and pressure for compressed air.
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Air Weight Formula
The following formula calculates air mass. Weight force is mass multiplied by standard gravity (9.80665 m/sยฒ).
Variables:
- m is the mass of air (kilograms)
- V is the volume of air (cubic meters)
- D is the density of the air (kilograms per cubic meter)
To calculate air mass, multiply air volume by density. Select a density source; calculated conditions use temperature and absolute pressure (standard sea-level values by default; a gauge reading adds 1 atm). Optional humidity uses a liquid-water approximation from 0โ50 ยฐC.
What is Air Weight?
โAir weightโ is often used colloquially for air mass within a given volume; kilograms measure mass, while newtons measure weight force. It is a function of air density, which can vary based on temperature, pressure, and humidity. Understanding the weight of air is important in various scientific and engineering applications, including meteorology, HVAC (heating, ventilation, and air conditioning), and aircraft design.
How to Calculate Air Weight?
The following steps outline how to calculate the Air Weight.
- First, determine the volume of air (V) in cubic meters.
- Next, determine the density of the air (D) in kilograms per cubic meter.
- Use the formula from above = m = V * D.
- Finally, calculate air mass (m) in kilograms. Weight force in newtons is m ร 9.80665.
- 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.
Volume of air (V) = 50 cubic meters
Density of the air (D) = 1.225 kg/mยณ (standard sea-level density)
