Calculator Use

Enter R and r then click Calculate to get the Volume and Surface Area of the Torus.

What is torus?

In geometry, a torus (plural tori, colloquially donut or doughnut) is a surface of revolution generated by revolving a circle in three-dimensional space about an axis that is coplanar with the circle.

What is the Formulas for calculating the torus?

Torus Volume：    V = π2 * (R + r) * (R - r)2 Torus Surface Area：    S = π2 * (R2 - r2) Here    R：Outer Radius    r：Inner Radius

Here’s what torus looks like: