Free Fall Calculator

Find how long an object falls and how fast it hits from a given height.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator finds the fall time and impact velocity of an object dropped from a given height under gravity alone (no air resistance), using the kinematic equations h = ½gt² and v = gt, where g is gravitational acceleration (9.81 m/s² on Earth).

Physics students and teachers use it to check homework and demonstrate that, in a vacuum, all objects fall at the same rate regardless of mass — a principle famously tested by Galileo. Enter the drop height to get the time to impact and the speed at landing; you can also switch g to model free fall on the Moon or another planet.

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