How it works
Use a ring torus with circular cross-section. Tube radius is smaller than centre-circle radius; spindle and horn tori are excluded. This form solves for tube radius; enter the known quantities in Volume, Centre-circle radius.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Volume | 394.7841760435743 cm³ | Formula symbol: V. Required unit: cm³. Must be greater than zero. |
| Centre-circle radius | 5 cm | Formula symbol: R. Required unit: cm. Distance from the centre to the edge; half the diameter. Must be greater than zero. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Volume
- 394.7841760435743 cm³
- Centre-circle radius
- 5 cm
Complete example results
- Tube radius
- 2 cm
Reading the result
The result solves for tube radius from the entered quantities. Check the result unit and the formula conditions before using it.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
When can I use the tube radius result?
Lengths use cm, areas cm² and volumes cm³ on one consistent scale. The positive real branch is selected; the supplied quantities must describe the stated shape.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method sources: pryor.mathcs.wilkes.edu