Frontal area is the total frontal area presented by the rider and bike. A typical cyclist presents a frontal area of 0.3 to 0.6 meters squared depending on position. Frontal areas of an average cyclist riding in different positions are as follows.
| Tops | 0.632 |
| Hoods | 0.40 |
| Drops | 0.32 |
Aerodynamic drag: CdA is calculated by multiplying Frontal Area: A by the Coefficient of drag: Cd.