Sphere Properties Calculator

Math

Calculate sphere properties from radius: volume and surface area. Volume = (4/3) × π × r³; Surface Area = 4π × r².

Formula

Volume = (4/3) × π × r³; Surface Area = 4π × r²
  • Radius: distance from center to surface
  • Diameter = 2 × radius
  • Surface Area = 4πr² (total outer surface)
  • Volume = (4/3)πr³ (space inside)

Example

Inputs
  • Radius: 5

Radius 5: Diameter = 10, Surface Area ≈ 314.16, Volume ≈ 523.60 cubic units.

Frequently asked questions

What is a sphere?
A 3D circle — all points equidistant from center. Ball, globe, planet shapes.
Why are there two formulas?
Surface area is the outer shell. Volume is the space inside. Different purposes.