Area Calculator
Area of any shape.
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Geometry
Sphere Volume Calculator
Enter the radius or diameter to get a sphere’s volume and surface area.
Sphere volume
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Cubic units.
| Surface area | — |
|---|---|
| Radius | — |
| Diameter | — |
| — |
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Enter your figures above to see the step-by-step working.
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How the Sphere Volume Calculator Works
A sphere’s volume is four-thirds π times the radius cubed: 4⁄3πr³. Enter the radius — or switch to diameter and it halves it — and the calculator returns the volume in cubic units along with the surface area, 4πr².
Because the radius is cubed, volume grows fast: doubling the radius makes the sphere eight times bigger. It works for balls, tanks, domes and planets alike.
volume = 4⁄3 × π × radius³
Frequently Asked Questions
What is the formula for the volume of a sphere?
V = 4⁄3πr³ — four-thirds of π times the radius cubed.
How do I find sphere volume from the diameter?
Halve the diameter to get the radius, then use 4⁄3πr³. Pick “diameter” and the calculator does it for you.
What is the surface area of a sphere?
4πr² — exactly four times the area of a flat circle with the same radius.
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