# Volume of a torus Calculator

## Calculates the volume and surface area of a torus given the inner and outer radii. | ||

- Purpose of use
- comparison of internal volumes of BMX tires, assumed to track elastic properties

- Purpose of use
- Decided to draw isometric sketches of shapes from online pages and the input units to find various calculations. This was all done out of boredom and I enjoy it.
- Comment/Request
- I had no idea that this site existed and am going to recommend this to others. Personally, I love looking at formulas as well. All I ask is the addition of a truncated torus and partial torus. what I mean is page for a torus but the cylinder that makes it up is like the cylinder on the "volume of a partial right cylinder" page, and another page for a torus but its cylinder does not wrap around all the way. The second one could just be "(torus formula) divided by degree of angle" or something like that, but I just would like to make sure. Thanks for the knowledge though!

- Purpose of use
- determine volume of o-ring
- Comment/Request
- thanks

- Purpose of use
- Calculating how long it might take to manually pump up one of the new 26 x 4 inch "fat tires" on an MTB.

- Purpose of use
- Volume of o ring.
- Comment/Request
- Enhancement suggestion. Calculating volume of O ring sold as 13.95 inside diameter and 2.62mm thickness required use of another calculator before use of torus calculator. 15mm by 2mm O ring can be done in my head before using Torus calculator

- Purpose of use
- As a demonstration tool
- Comment/Request
- Since o-rings are typically specified (& sold) by inside diameter and the cross section this would be a very useful (& time saving) option

- Purpose of use
- Checked against what I guessed would be the volume of a torus. My equation was longer, but this was the simpler version.

I guessed it was the radius of the torus, times the average of the circumferences.

Pi*[(b-a)/2]^2*[(2*Pi*b)+(2*Pi*a)/2]

Turns out I was right, and after factoring it out, I reduced it to the same equation. - Comment/Request
- It's great. A note explaining that it is similar to calculating a cylinder, and that you are averaging the circumference to get the "length" would be nice.

- Purpose of use
- physics experiment

- Purpose of use
- Checking a derived equation

- Purpose of use
- calculate the volume of an inner tube to estimate buoyancy and weight carrying capacity on water

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