Free Fall Acceleration Calculator

Calculating the free fall acceleration of an object is essential in various physics-related scenarios. Whether you’re studying the motion of objects or planning experiments, having a tool like the Free Fall Acceleration Calculator can simplify your calculations significantly.

Formula: The free fall acceleration of an object can be calculated using the following formula:



  • ���aff​ = Free fall acceleration (m/s²)
  • g = Acceleration due to gravity (usually 9.8 m/s² near the surface of the Earth)
  • ��Fa​ = Force of air resistance (N)
  • m = Mass of the object (kg)

How to Use:

  1. Enter the force of air resistance in Newtons (N) into the designated field.
  2. Input the mass of the object in kilograms (kg).
  3. Click on the “Calculate” button to obtain the free fall acceleration.

Example: Suppose we have an object with a force of air resistance of 3 N and a mass of 5 kg.

  • Force of Air Resistance (N): 3
  • Mass of the Object (kg): 5

After inputting these values and clicking “Calculate,” the Free Fall Acceleration Calculator will determine the free fall acceleration to be approximately 9.8−359.8−53​, which equals approximately 9.2 m/s².


  1. What is free fall acceleration?
    • Free fall acceleration is the acceleration an object experiences when falling under the influence of gravity, neglecting any air resistance.
  2. What is the value of acceleration due to gravity?
    • Near the surface of the Earth, acceleration due to gravity is approximately 9.8 m/s².
  3. How does air resistance affect free fall acceleration?
    • Air resistance opposes the motion of the object, reducing its overall acceleration.
    • The greater the force of air resistance, the lower the free fall acceleration.
  4. Can free fall acceleration be negative?
    • Yes, if the force of air resistance is greater than the force due to gravity, the free fall acceleration can be negative, indicating that the object is decelerating.
  5. Is free fall acceleration constant?
    • In a vacuum or when air resistance is negligible, free fall acceleration is constant at approximately 9.8 m/s².
  6. What units are used to measure free fall acceleration?
    • Free fall acceleration is typically measured in meters per second squared (m/s²).
  7. How does mass affect free fall acceleration?
    • Greater mass results in a smaller free fall acceleration, as indicated by the formula ���=�−���aff​=gmFa​​.
  8. Can air resistance ever be zero?
    • In practical scenarios, it’s challenging to completely eliminate air resistance, but in a vacuum, air resistance is effectively zero.
  9. Why is it important to calculate free fall acceleration?
    • Understanding free fall acceleration is crucial in various fields, including physics, engineering, and aerospace, for designing and analyzing systems involving falling objects.
  10. How accurate is the Free Fall Acceleration Calculator?
    • The calculator provides accurate results based on the input values provided by the user.

Conclusion: The Free Fall Acceleration Calculator simplifies the process of determining the acceleration of an object in free fall, considering the force of air resistance and the object’s mass. Whether you’re a student, scientist, or engineer, this tool can aid in various applications involving objects in motion. Understanding free fall acceleration is fundamental in many scientific disciplines, and having access to tools like this calculator can streamline calculations and enhance learning and problem-solving experiences.