Impact Velocity Calculator

Calculating impact velocity is crucial in various fields such as physics, engineering, and safety assessments. Whether it’s understanding the speed at which an object hits the ground or predicting the outcome of a collision, knowing the impact velocity is fundamental.

Formula: The impact velocity formula is derived from the principles of kinematics and gravitational acceleration. It is expressed as:

Impact Velocity (v) = Square Root of (2 * g * h)


  • v is the impact velocity in meters per second (m/s).
  • g is the acceleration due to gravity, approximately 9.81 m/s^2 on Earth.
  • h is the height from which the object falls in meters (m).

How to Use: To utilize the impact velocity calculator, simply input the height (h) from which the object falls in meters. Then click on the “Calculate” button to obtain the impact velocity in meters per second.

Example: Suppose an object is dropped from a height of 10 meters. Using the impact velocity formula, we can calculate the impact velocity:

v = sqrt(2 * 9.81 * 10) v ≈ 14.00 m/s

Thus, the impact velocity of the object hitting the ground from a height of 10 meters is approximately 14.00 m/s.


  1. What is impact velocity? Impact velocity is the speed at which an object strikes a surface or another object.
  2. Why is calculating impact velocity important? Calculating impact velocity helps in understanding the severity of collisions, predicting damage, and designing safety measures.
  3. What is the unit of impact velocity? Impact velocity is typically measured in meters per second (m/s).
  4. How does height affect impact velocity? Impact velocity increases with the height from which an object falls. Higher heights result in greater velocities upon impact.
  5. Can impact velocity be negative? No, impact velocity cannot be negative as it represents the speed of an object upon impact, which is always positive or zero.
  6. Is impact velocity affected by air resistance? Yes, in real-world scenarios with significant air resistance, the impact velocity may be lower than the theoretical value calculated without considering air resistance.
  7. What if the height is negative? The height should be a positive value since it represents the distance from which the object falls. Negative heights are not physically meaningful in this context.
  8. Can I use this calculator for heights on other planets? Yes, you can use this calculator by inputting the height in meters, regardless of the planet’s gravitational acceleration.
  9. How accurate is the calculated impact velocity? The calculated impact velocity is accurate under ideal conditions without considering factors like air resistance, shape of the falling object, and other external forces.
  10. Can I calculate impact velocity for objects thrown horizontally? No, this calculator is specifically for objects falling vertically due to gravity. For horizontal throws, you would need different calculations.

Conclusion: The impact velocity calculator provides a simple yet effective way to determine the velocity at which an object hits a surface after falling from a certain height. Understanding impact velocity is essential in various fields, from physics experiments to engineering designs and safety assessments. By utilizing the provided formula and calculator, users can quickly obtain accurate results for their applications.