Compute volume and surface area of a torus from its major and minor radii.
A torus is a donut-shaped surface of revolution. Major radius R is from the center of the torus to the center of the tube; minor radius r is the tube's radius. Volume = 2π²Rr², Surface area = 4π²Rr.
Volume
V = 2π²Rr²
Surface Area
SA = 4π²Rr
The torus self-intersects (spindle torus). This calculator requires r ≤ R for a standard ring torus.
By rotating a circle of radius r about an axis at distance R from its center.