How it works
For a body released from rest with constant gravity and no drag, fall time = √(2h/g).
Input definitions
- Drop height (m)
- Enter the value in the labeled unit.
- Gravity (m/s²)
- Enter the value in the labeled unit.
A worked example
- Drop height (m)
- 10
- Gravity (m/s²)
- 9.80665
Assumptions & limits
Ideal educational model in the stated SI units. Real equipment, structural design and safety decisions need appropriate professional analysis; losses are excluded unless entered.
Sources & review
Maintained by AnsRio. Methods and examples use automated checks; this does not imply independent professional certification.
Method updated 2026-10-18. Content checked against the stated method and examples. Our verification approach.
Common questions
Does mass affect this ideal fall time?
No. In this model acceleration is independent of mass. Real drag depends on shape, area, fluid density and speed.
How does Free-fall time from rest work?
For a body released from rest with constant gravity and no drag, fall time = √(2h/g).
What should I check before using Free-fall time from rest?
Ideal educational model in the stated SI units. Real equipment, structural design and safety decisions need appropriate professional analysis; losses are excluded unless entered.