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Physics

Free Fall Time Calculator

Estimate the time to fall from rest through a given height.

SI units shown beside each fieldIdeal model explained below

Physical quantities

Runs on your device

CALCULATED QUANTITY

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter vertical height, gravitational acceleration.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Time = √(2 × height/g).

A WORKED EXAMPLE

Using vertical height = 10 m, gravitational acceleration = 9.80665 m/s², the result is 1.42808698 s. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Ignores air resistance and assumes release from rest. An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Common questions

Which inputs does this calculation need?

Estimate the time to fall from rest through a given height. Enter vertical height in m, gravitational acceleration in m/s². The filled example is editable and is not a saved personal record.

How should I interpret the result?

Ignores air resistance and assumes release from rest. An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Methodology maintained by ClarityKit. How these tools are built and checked.