Free-Fall Drop Time
Find how long an object takes to fall from a height — or how far it falls in a given time — and its impact speed, free online.
About this calculator
Ignoring air resistance, a body released from rest falls h = ½gt². So t = √(2h/g) and the speed on impact is v = gt = √(2gh). Standard gravity is 9.80665 m/s²; change g to model other planets.