Free Sphere Volume & Surface Area Calculator Online
Calculate sphere volume (V = 4/3 πr³) and surface area (A = 4πr²) given radius, diameter, or circumference. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Enter Radius or Diameter
Input sphere radius or diameter.
Calculate Volume
Formula: V = (4/3) × π × r³.
Calculate Surface Area
Formula: A = 4 × π × r².
Frequently Asked Questions
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