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Mihsaba›Free Fall Calculator

Free Fall Calculator

Calculate impact time and final vertical velocity from a known height with optional initial downward velocity and selectable gravity.

These are idealized models: collision assumes sticking, free fall ignores air drag, and the pendulum uses the small-angle approximation.

How to use

This free-fall tool models vertical motion with constant downward acceleration. Initial velocity is positive downward; use zero for an object released from rest.

  1. Enter height.
  2. Enter downward initial velocity or zero.
  3. Enter g.
  4. Review impact time and final velocity.

How it is calculated

h=v₀t+½gt²; v=v₀+gt

Example

Example: released from 20 m at g=9.80665 m/s², impact occurs in about 2.02 s at about 19.8 m/s.

Important notes

The model ignores air resistance and treats g as constant. Light objects, high speeds or large distances can differ significantly.

Frequently asked questions

Is free-fall speed constant?

No; velocity changes under constant acceleration.

Can I change g?

Yes.

Is air drag included?

No.