No longer being updated, but we link to others which are being updated.

When opening Spocalc, you must choose Enable if you wish to use these macros.

If your virus checker disables them you can still use Spocalc without the macros - you just have to type in the numbers by hand.

In newer Excel versions which have ribbons instead of menus, there is no Tools menu, and also no Help menu.

Clicking on the tiny question mark at the right-hand side of the ribbon and searching on Using macros led me to information.

Then in the Developer tab, click on the Macros icon.: A list of macros will appear.

With some hubs, there will be hardly any bracing angle unless you cross spokes over to the far side of the rim.

An e-bike hub motor may have narrow spacing between the flanges, so crossing the spokes over may also be useful.

I describe two additional ways to measure rim diameter in my article on this site -- John Allen.

Wheel Fanatyk, many interesting blog posts and articles about wheelbuilding.

Searching the Google Play site or Apple Apps Store finds others.

Excel For Mac Quicksheet