Sphere from Volume Calculator
Find a sphere's radius from its volume.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator inverts the sphere volume formula, V = (4/3)πr³, to solve for radius: r = (3V/4π)^(1/3). From that radius it also reports the diameter (2r) and surface area (4πr²), so a single known volume gives you every other size measurement of the sphere.
It comes up whenever volume is the number you actually have but size is what you need — sizing a spherical storage tank or pressure vessel to fit a given capacity, working out the radius of a water droplet or gas bubble from its measured volume in a lab, or checking a ball's diameter from a manufacturing spec. Engineers, chemistry and physics students, and packaging designers all use it the same way.
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