mechanics
Free Fall Calculator
Calculate fall time, distance, and impact velocity from elapsed time or fall height with configurable gravity and initial downward velocity.
Calculator
Formula
h = ut + ½gt²; v = u + gt; v² = u² + 2gh
Assumptions and limits
- Downward is positive and air resistance is ignored.
Example
20 metre drop
The calculator starts with an editable example.
Sources
- University Physics Volume 1 — OpenStax
Frequently asked questions
Are my inputs uploaded?
No. This calculator runs locally in your browser. Inputs are placed in a URL only when you explicitly copy a share link.
Why are units converted first?
Canonical units prevent scale errors when inputs use mixed units. The result is converted back to your selected output unit afterward.
Does the result replace professional judgment?
No. The result applies only to the stated model and assumptions. Qualified people should review high-risk engineering, medical, or laboratory decisions.