Free Fall Calculator
Find how long a dropped object takes to fall, how far it falls and how fast it hits — on Earth, the Moon or another planet.
Fall time
4.51601 s
- Distance fallen
- 100 m (328.084 ft)
- Impact speed
- 44.2869 m/s (159.433 km/h, 99.067 mph)
Ignores air resistance, which slows light or fast-falling objects noticeably.
Show the work
Fall time
t = √(2h ÷ g)
√(2 × 100 ÷ 9.80665) = 4.51601 s
How it works
Dropped from rest, no air resistance: h = ½gt², v = gt = √(2gh), t = √(2h ÷ g)
Questions
- How does the free fall calculator work?
- Dropped from rest, no air resistance: h = ½gt², v = gt = √(2gh), t = √(2h ÷ g).
- What do I need to enter?
- I know the, Drop height, Drop height unit, Fall time, Impact speed, Impact speed unit, Gravity, Custom gravity. Optional fields can be left blank.
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