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Formula Sphere Area    Radius   

Formula
Formula: Sphere
Sphere with its Radius and Diameter

Area

Unit
Surface area of the sphere with radius \(r\). For example, if the radius is \( r = 1 \, \text{m} \), then the surface area is:$$ A ~=~ 4\pi \,\cdot\, (1 \, \text{m})^2 ~\approx~ 12.7 \, \text{m}^2$$

Alternatively, the surface area of the sphere can be expressed with the diameter \( d = 2r\):\[ A ~=~ \pi \, d^2 \]

Radius

Unit
Radius of the sphere.

Pi

Unit
Pi is a mathematical constant and has the value \( \pi ~=~ 3.1415926... \)