Sphere volume, surface area, diameter, and great-circle circumference from the radius with exact formulas.. Sphere Calculator is a free online tool from the ToolsRift Math Calculators collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
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How to use Sphere Calculator
Enter the sphere's radius and the calculator instantly returns its volume, surface area, diameter and great-circle circumference.
Frequently asked questions
What sphere properties are calculated?
From the radius it returns volume, surface area, diameter and the great-circle circumference.
What are the sphere formulas?
Volume = (4/3)πr³ and surface area = 4πr², with diameter = 2r and great-circle circumference = 2πr.
What is a great circle?
The largest circle that can be drawn on a sphere, passing through its center; its circumference is 2πr.
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