Sphere 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 = ⁴⁄₃πr³
Where this usually goes wrong
Cubed, so doubling the radius makes the sphere eight times bigger, not twice.
Worked example
A radius of 3 gives a volume of 113.1.
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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