Torus Surface Area Calculator
Calculate the surface area of a torus (donut shape) with ease.
Calculate Surface Area
Results
Enter radii to calculate.
About Torus Surface Area
Formula:
SA = 4π²Rr
V = 2π²Rr²
where:
- R = Major radius
- r = Minor radius
Properties:
- Donut-shaped surface
- Gaussian curvature varies
- Topologically equivalent to a sphere
- Common in engineering and architecture