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Radius to Surface Area of Sphere Calculator


Calculate Surface Area of Sphere
Radius (r) [?]
Surface Area (A) [?]

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Contents

Toggle
  • User Guide
    • Formula
      • Symbols
    • Radius of Sphere
    • Surface Area of Sphere

User Guide

This tool will calculate the surface area of a sphere from the radius, and will convert different measurement units for radius and surface area.

Formula

The formula used to calculate sphere volume is:

A = 4 · π · r2

Symbols

  • A = Sphere surface area
  • π = Pi = 3.14159…
  • r = Sphere radius

Radius of Sphere

Enter the radius of a sphere. The radius is the distance between the centre and any point on the surface of a sphere.

Surface Area of Sphere

This is the total area of the surface of a sphere with the specified radius. The sphere surface area represents the total area of the outer surface of the sphere if it was to be laid out flat as a two-dimensional shape, e.g. a true scale map of the world is a 2D scaled representation of the surface area of the world.

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