Model Rocket Parachute Descent Rate Calculator

This page allows you to predict the speed at which your rockets will descend. Note that it is only an estimate, and values will vary with wind, different air pressures, etc.

Enter rocket mass:
Enter parachute diameter: or SkyAngleTM size:

Choose the shape of your parachute:

How did you measure the size of your chute? (For hex and square chutes)

(Optional) Estimate the descent time by entering the expected altitude when the parachute will open:

Parachute descent rate calculator version 3.3 by Jordan Hiller.