Sphere Surface Area Calculator

Shape :
Calculate :
r
SA = 4πr2
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What is a Sphere ?

A sphere is a perfectly round geometrical object in three-dimensional space, similar to a ball. All points on the surface of a sphere are equidistant from the center. It is defined by a single parameter, its radius.

The formula for calculating the surface area (SA) of a sphere is given by:

SA = 4 x π x r2

where:

  • SA is the surface area of the sphere
  • π (pi) is a mathematical constant approximately equal to 3.14159265359
  • r is the radius of the sphere.

To use the formula, simply plug the radius of the sphere, and then calculate the result. Remember to use consistent units for your measurements

Author Information

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Rajesh V U

Full-Stack Developer & Storage Technologist | Creator of UnitSmash.com
Last updated: June 1, 2026

I am a Storage Technologist with strong experience in enterprise storage systems, Angular development, and web-based tools. I enjoy building practical calculators, converters, and utilities, and I also create original cartoons. I share my tools, articles, and creative work on my personal website, rajeshvu.com.