Aerodynamic Diameter Calculator

This tool calculates the aerodynamic diameter of an irregular shape particle or object. Aerodynamic diameter is defined as the diameter of a water droplet falling under gravity in air having the same settling velocity as that of the irregular shape particle.



Type the required values to get the aerodynamic diameter:

Particle mass (m, kg)


Particle Density (ρ, kg/m3)


Air Density (ρair, kg/m3)



Aerodynamic Diameter (m)


Terminal velocity (m/s)