Terminal Velocity Calculator
🧱 Forces & Newton’s laws. Use the Terminal velocity (drag = weight) formula to find terminal velocity, mass, air density, drag coefficient, area facing the air: pick the value you want, type the others, and the answer updates as you go.
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Terminal velocity | m/s |
| Mass | kg |
| Air density | kg/m³ |
| Drag coefficient | no unit |
| Area facing the air | m² |
Worked example
Find the terminal velocity when Mass = 75 kg, Air density = 1.225 kg/m³, Drag coefficient = 1, Area facing the air = 0.41 m².
Using vt = √(2mg/(ρ Cd A)): Terminal velocity = 54.128 m/s.
Frequently asked questions
What is the formula for Terminal velocity (drag = weight)?
vt = √(2mg/(ρ Cd A)).
What do the letters stand for, and what units are used?
Terminal velocity in m/s, Mass in kg, Air density in kg/m³, Drag coefficient, Area facing the air in m².
How do you calculate terminal velocity?
Put the values into vt = √(2mg/(ρ Cd A)). For example, with Mass = 75 kg, Air density = 1.225 kg/m³, Drag coefficient = 1, Area facing the air = 0.41 m², terminal velocity = 54.128 m/s.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (terminal velocity, mass, air density, drag coefficient, area facing the air) and fill in the others: it rearranges the formula for you.
