Torus Surface Area Calculator

Your details

Both methods describe the same shape. Use whichever pair of measurements you have.
The radius of the circular cross-section of the tube, measured from the center of the tube to its surface.
cm
The distance from the center of the torus to the center of the tube (sometimes called the major radius).
cm
Surface area
947.482

Total outer surface area of the torus

Surface area unitcm²
Volume1,421.223
Volume unitcm³
Tube radius (r)3
Radius of revolution (R)8
Inner radius (a)5
Outer radius (b)11
Torus typeRing torus (R > r)
Surface area947.482
Volume1,421.223

Surface area: 947.4820 cm²

  • The surface area is 947.4820 cm² and the enclosed volume is 1421.2230 cm³.
  • The ratio R/r is 2.67, making this a ring torus with a visible central hole.
  • The tube-to-ring proportion is in the typical range for everyday torus shapes.

Next stepTo verify, use the formula A = 4 x pi^2 x r x R, or equivalently A = pi^2 x (b^2 - a^2) using the inner and outer radii.

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