Torus Calculator (Donut Shape)
Major Radius (R)
Minor Radius (r)
R = distance from torus center to tube center. r = tube radius.
A torus is the 3D shape of a donut or ring. It is formed by rotating a circle of radius r around an axis at distance R from the circle's centre. The inner hole appears when R > r.
- 1R = distance from the centre of the tube to the centre of the torus
- 2r = radius of the tube itself
- 3Volume = 2π² × R × r²
- 4Surface area = 4π² × R × r
R=5, r=2 (donut shape)=Volume = 394.8 units³ · SA = 394.8 units²Coincidental equality for these values
R=10, r=3 (thin ring)=Volume = 1,776.5 units³2π² × 10 × 9
References
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