Math & Statistics
Torus Calculator
Find the volume and surface area of a torus (donut shape).
Your inputs
Change any value to update the result instantly.
Volume
631.6547
Surface area
631.6547
Outer diameter
20
Formula and working
V = 2π²Rr², A = 4π²Rr
- 1
Collect the inputs
Tube center to torus center R = 8; Tube radius r = 2
- 2
Apply the formula
V = 2π²Rr², A = 4π²Rr
- 3
Result
Volume = 631.6547
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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