Surface Area of a Hemisphere Calculator

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Pick whichever measurement you already know; the calculator derives everything else.
Linear unit applied to all inputs and outputs.
Enter the known measurement in the selected unit.
cm
Total surface area
235.6194cm²

Curved cap area + flat base area (3 * pi * r^2)

Curved surface area157.0796cm²
Base area78.5398cm²
Radius5cm
Diameter10cm
Volume261.7994cm³
Base circumference31.4159cm

Total surface area is 235.6194 cm^2 for a hemisphere with radius 5.0000 cm.

  • The curved dome accounts for 66.7% of the total surface area (157.0796 cm^2).
  • The flat circular base accounts for 33.3% (78.5398 cm^2).
  • A hemisphere with twice the radius has four times the surface area, because area scales with the square of the radius.

Next stepIf you are calculating material needed for a dome or bowl, use the curved surface area only. Include the base area when the flat bottom is also covered.

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