How it works
Estimate fall time and speed from rest with constant gravity and no air resistance. Real objects may behave differently.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Drop height | 20 m | Required unit: m. Use a non-negative value. |
| Gravity | 9.80665 m/s² | Required unit: m/s². Must be greater than zero. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Drop height
- 20 m
- Gravity
- 9.80665 m/s²
Complete example results
- Fall time
- 2.01961998 s
- Impact speed
- 19.80570625 m/s
Reading the result
Check the units used in the formula together. The result follows the stated ideal model and supplied constants; material, environment and losses are included only where the inputs or method explicitly define them.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.