Cylinder volume 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
V = πr²h
Where this usually goes wrong
Radius, not diameter — and it is squared, so halving the wrong number quarters the answer.
Worked example
A radius of 3 and height of 10 holds 282.7.
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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