The drag coefficient is a number used in fluid dynamics to determine the resistance encountered by an object moving through a fluid.

For example, a person doing a mid belly flop has a drag coefficient of around 1, while a Ram 1500 pickup truck has a Cd of 0.36. So, it’s less about the size than the shape of the object moving ...

Tesla Cybertruck's Claimed Drag Coefficient Of 0.34 Put To The Test A computational fluid dynamics expert says the Cybertruck is really aerodynamic for a pickup.