Gravitational potential energy calculator
Fill in what you know and leave the unknown box empty — it works out whichever one is missing. Nothing is uploaded; the arithmetic happens in your browser.
The formula
PE = mgh (g = 9.81 m/s²)
Where this usually goes wrong
Height is measured from whatever you call zero. Only the change in height matters, so pick the floor and stay with it.
Worked example
A 2 kg book on a 10 m shelf holds 196 J.
Those numbers are already in the boxes above — press Work it out to see it, then change them for your own.
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