Free fall calculator

Calculate fall time and impact speed with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use fall time and impact speed to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Drop height (m)
20
Gravity (m/s²)
10
Fall time (s)
2
Impact speed (m/s)
20

Try another scenario

Drop height (m)
22
Gravity (m/s²)
10
Fall time (s)
2.097618
Impact speed (m/s)
20.976177
Calculation method

Calculation method

Fall time (s)

sqrt(2 × a ÷ b)

Impact speed (m/s)

sqrt(2 × a × b)

Symbols and units
a
Drop height (m)
b
Gravity (m/s²)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Calculation steps and notation

sqrt(x) is the non-negative square root of x.

Assumptions & limits

Assumptions & limits

  • Starts from rest, with no air resistance and constant gravity.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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