Study basic kinematics with our Free Fall Calculator. Enter drop height and optional initial velocity to compute the time to impact and final velocity using constant acceleration. Add mass to estimate kinetic energy at impact.
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Free Fall Calculator
Calculate the time to impact, final velocity, and impact energy for objects in free fall. Includes gravity presets for Earth, Moon, and Mars.
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1
Enter Height
Input the drop height in meters.
2
Initial Velocity
Optionally enter the starting velocity (downward positive).
3
Gravity
Choose Earth, Moon, or Mars gravity.
4
Mass (Optional)
Add mass in kg to compute impact energy (Joules).
Key Features
Multiple Gravities
Toggle gravity for Earth (9.81), Moon (1.62), and Mars (3.71) m/s².
Energy Estimate
Instantly see kinetic energy at impact given mass.
Live Updates
All values update immediately as you change inputs.
Frequently Asked Questions
No. This calculator assumes vacuum conditions with constant acceleration.
Downward velocities should be positive; use 0 for a simple drop.
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