Surface Area of a Sphere Calculator

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Surface areaLarge sphere
314.1593cm²

Total outer surface area of the sphere (4πr²)

Volume523.5988cm³
Radius5cm
Diameter10cm
Circumference31.4159cm
Surface-to-volume ratio0.6

Surface area = 4πr² = 314.1593 cm²

  • The surface area is 314.1593 cm² and the volume is 523.5988 cm³.
  • The circumference of the great circle is 31.4159 cm.
  • The surface-to-volume ratio is 0.6000 per cm - as a sphere grows, this ratio falls, meaning more volume is enclosed per unit of surface.
  • A sphere has the smallest possible surface area for any closed shape of a given volume, which is why soap bubbles and water droplets are spherical.

Next stepTo find the area of a hemisphere, halve the sphere surface area and add the area of the flat circular base (πr²).

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