Terminal Velocity

v = √(2mg/(ρ C_d A)) at steady drag = weight.

Mass (kg)

C_d

Area (m²)

ρ air (kg/m³)

Tab to move between fields

m/s

44.551

mph99.7

How to Use This Calculator

Enter the object mass (kg).
Set the drag coefficient Cd -- sphere ~0.47, skydiver flat ~1.0, skydiver streamlined ~0.7.
Enter the cross-sectional area (m2) and air density (kg/m3) -- 1.225 at sea level.
Review terminal velocity in m/s and mph.
Reduce area or Cd to increase terminal velocity -- relevant for vehicle aerodynamics and projectile ballistics.

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