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Torus Calculator

R
r

Result

Volume1,776.53 cm³
Surface Area1,184.35 cm²
Outer Diameter26 cm
Inner Diameter (hole)14 cm
↗ Math

Torus Calculator — free online calculator.

Formula

V = 2π²Rr²; SA = 4π²Rr
  • Torus Calculator calculates its result from Rr. It uses the formula V = 2π²Rr²; SA = 4π²Rr. Change any input to recalculate the result instantly.
  • The main inputs are Major Radius, Minor Radius. Enter them in the units and format shown in the calculator.
  • Keep comparable quantities in compatible units whenever the formula combines or compares them.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Torus

Inputs
  • Major Radius: 10
  • Minor Radius: 3

Using Rr = 2, the calculated result is 78.9568352087.

Sample result: Calculating…

Frequently asked questions

What does the Torus calculate?

Torus Calculator — free online calculator.

Which values should I enter?

Enter Major Radius, Minor Radius using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: V = 2π²Rr²; SA = 4π²Rr.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026