Sphere Calculator
Free sphere calculator. Calculate volume, surface area, radius, diameter from any known value. Instant results with formulas and diagrams.
Sphere Formulas
Volume: V = (4/3)πr³
Surface Area: A = 4πr²
Diameter: d = 2r
Circumference: C = 2πr (great circle)
Sphere Facts
• A sphere has the smallest surface area for a given volume
• All points on a sphere are equidistant from its center
• The Earth is approximately a sphere (oblate spheroid)
• Soap bubbles form spheres due to surface tension minimization
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