Free Fall Calculator (Distance and Speed from Time)

Find free fall distance and speed from the fall time. With initial speed zero and gravity g=9.80665 m/s squared, it gives distance, speed in m/s and km/h, and kinetic energy per mass.

Input

Compute the fall distance and speed from the fall time, for an object dropped from rest. Air resistance is ignored.

Fall time t

Enter the elapsed time in seconds since the object started to fall.

Gravity acceleration is g = 9.80665 m/s squared.

Result

Fall distance

44.129925m

Fall speed

29.41995 m/s

Speed in km/h

105.91182 km/h

Kinetic energy per mass

432.766729 J/kg

Fall distance d = (1/2) g t squared, fall speed v = g t. Here g is the gravity acceleration 9.80665 m/s squared and t is the fall time.

How it works

Fall distance is d = (1/2) g t squared, where t is the fall time in seconds and g is the gravity acceleration.
Fall speed is v = g t. Multiply by 3.6 to convert m/s into km/h.
The gravity acceleration uses standard gravity g = 9.80665 m/s squared.
This assumes the object starts from rest with no air resistance. Real values are smaller because of drag.
Kinetic energy per unit mass is shown as (1/2) v squared in J/kg.

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