Free Fall Calculator

Find fall time and impact speed from a drop height, ignoring air resistance.

Quick answer: Free Fall Calculator: Find fall time and impact speed from a drop height, ignoring air resistance. Everything runs in your browser, so nothing you enter is uploaded or stored.

Height (m)

Gravity (m/s2)

How to use Free Fall Calculator

Enter your values in the fields.
The results update instantly as you type.
Note or copy the numbers you need.

Features

Instant results
Free, no signup
Runs in your browser, nothing is uploaded
Works on phone and desktop

Formula

t = sqrt(2h / g), v = g x t.

Worked example

A drop of 100 m takes about 4.52 s and ends at about 44.3 m/s (159 km/h).

Frequently asked questions

What is the formula?

Time = square root of (2h / g). Speed = g x time.

Does it include air?

No. Real objects fall slower because of air resistance.

Is the Free Fall Calculator free?

Yes. It is free, needs no signup and works on any device.