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`t = sqrt(2 ( h /g))`

Enter a value for all fields

The **Free Fall (time)** calculator computes the duration of time that an object will be in free fall based on the height and the acceleration due to gravity.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**h**) This is the height of the free fall

**Free Fall Duration (t):** The calculator returns the time in seconds. However this can be automatically converted to compatible units via the pull-down menu.

Time of Free Fall equation is meant for the context of free fall, or constant acceleration downwards due to Earth's gravity without rest, ignoring air resistance. Here, t is the time it takes for the object in question to fall a given distance (Height) with it's acceleration of g (the acceleration at sea level due to gravity, roughly 9.8 m/s^2).

The formula for the time of free fall is:

`t = sqrt( (2·h) / g)`

where:

- t is the time duration of a free fall
- h is the height of the free fall
- g is the acceleration due to gravity

**Free Fall (time)**: Computes the duration of time that an object will be in free fall based on the height and the acceleration due to gravity.**Free Fall (distance):**Computes the distance that an object will be in free fall based on the duration of the fall and the acceleration due to gravity.**Free Fall (Velocity at Impact)**: Computes the final velocity of an object after a free fall based on the height and the acceleration due to gravity.**Free Fall (Energy on Impact)**: Computes the kinetic energy at impact based on the height of free fall, acceleration due to gravity and the mass of the object.**Model Rocket Altitude**: Computes the estimated maximum altitude of a rocket based the distance from the launch point and the angle to top point of flight (zenith).**Object Height by Time to Drop**: Estimates the height of an object based on the time it takes for an object to drop from the top of it.**Elevation of Object (angles and separation):**Computes the height of an object based on two angle measurements and the distance between them.**Distance Traveled at Constant Acceleration**: Computes the distance traveled by an object after a period of time, based on its initial distance from the origin, initial velocity and a constant acceleration.**g (acceleration due to gravity at sea level)**: Acceleration due to Gravity (g) at sea level on Earth is 9.80665 m/s^{2}.