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Contents

## Related Tools

- Sphere surface area to radius calculator
- Calculate sphere volume from radius
- Convert an area to different units
- Length and distance converter
- Calculate circle area from radius
- Calculate circle circumference from radius
- Calculate circle diameter from radius

## 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 · r^{2}

#### 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.