Drag coefficient Calculator.

The drag coefficient is a dimensionless quantity used in fluid dynamics to quantify the drag or resistance experienced by an object moving through a fluid (such as air or water). It represents the ratio of the drag force acting on the object to the dynamic pressure of the fluid and the reference area of the object.

Where:

• Cd​ is the drag coefficient,
• $D$ is the drag force,
• $\rho$ is the density of the fluid (air, in most cases),
• $V$ is the velocity of the object relative to the fluid,
• $A$ is the reference area of the object.