Free Drag Force Calculator
Compute the aerodynamic drag force on a body from its drag coefficient, air density, velocity, and reference area.
Drag Force (D)
2,940.00 N
Drag Force (D) vs Drag Coefficient (CD)
Aerodynamic Drag Force
Drag is the resistive force opposing an object moving through a fluid. It depends on the shape (captured by CD), the flight condition, and the size of the body.
Formula
D = CD × 0.5 × rho × V² × S
The power needed to sustain flight against this drag is P = D × V. Minimizing drag is a central goal in aerospace and automotive design because it directly reduces fuel burn.
Example Calculation
An aircraft wing with CD = 0.03, area 25 m², flying at 80 m/s in sea-level air.
- 01Dynamic pressure q = 0.5 × 1.225 × 80² = 3920 Pa
- 02Drag = 0.03 × 3920 × 25 = 2940 N
- 03Power = 2940 × 80 / 1000 = 235.2 kW
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