Free Fall Calculator
Find fall time, height and impact speed for a dropped object. The result updates as you type, with the working underneath so you can check it.
Your details
I know the
Result
Fall time
2.01962 s
- Impact speed
- 19.8057 m/s (71.3005 km/h)
- Vacuum model: ignores air resistance.
Good to know: h = ½gt²
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
About this tool
Formula
h = ½gt²
Questions people ask
How fast is an object after falling 20 m?
About 19.8 m/s (71 km/h) in a vacuum, after 2.02 seconds. Air resistance reduces this.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it. How we check our calculators