Terminal Velocity Calculator

The Terminal Velocity Calculator is built for falling objects where drag eventually balances weight. It balances gravitational force against quadratic drag to estimate terminal velocity.

The calculator solves the drag-balance equation using density, drag coefficient, projected area, mass, and gravity.

• Estimate skydiving or falling-object limits.
• Compare drag shape effects.
• Teach force balance in fluids.

For quadratic drag, terminal velocity is vt = sqrt((2mg) / (rho * Cd * A))

Use the formula panel beside the calculator to keep the variables visible while you enter values.

• m = mass
• g = gravity
• rho = fluid density
• Cd = drag coefficient
• A = cross-sectional area

Enter mass, gravity, drag coefficient, projected area, and fluid density. The calculator keeps the fields focused on this specific problem so you do not have to adapt a generic velocity form by hand.

After you press Calculate, the result panel shows terminal velocity in m/s, km/h, mph, and ft/s. Reset clears the example values so you can start a fresh scenario.

• Use consistent real-world measurements for the selected scenario.
• Check that time, area, mass, or temperature values are positive where the formula requires them.
• Read the step-by-step substitution before using the final number in homework, design notes, or planning.

For an 80 kg object with Cd = 1.0, area = 0.7 m^2, and air density = 1.225 kg/m^3, terminal velocity is about 42.76 m/s.

A larger mass raises terminal velocity, while larger area, density, or drag coefficient lowers it.

The extra output rows give practical companion values so the answer is easier to compare against common units or planning targets.

The formula assumes quadratic drag, a constant drag coefficient, constant fluid density, and a stable falling orientation.

For professional engineering, safety, aviation, ballistics, medical, or project-management decisions, treat the result as a calculation aid and verify it against the standards used in your field.