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## How to Use the Torus Calculator

This calculator allows you to compute various measurements of a torus (or toroid) given known values.

To compute the surface area and volume of a torus in terms of it's two radii, click the 'Dimensions' button and enter the values for the major radius and the minor radius. The surface area and volume will appear in the both the torus preview and the math area, where the formulae used to make the calculations are shown. To save either the calculated surface area or volume, click the button that shows the resulting value and it will be copied to the clipboard, or click the 'Save' button to store the calculation in the calculator tape for later reference.

To calculate one of the torus's radii and volume in terms of the torus surface area, you can click the 'Area' button and supply the known values for the area. This will also display buttons with the missing torus radius and volume values that can be used to copy these calculations to the clipboard.

Finally, to calculate one of the torus's radii and area in terms of the torus's volume, click the 'Volume' button and enter the known volume.