After much frustration, my Calculators are back online. For some reason, WordPress (my blog software) prohibited the embedding of non-Wordpress pages within WordPress. This broke the connection to my Calculators. Finally, I gave up fighting and have made the links to (apparently) external pages. The Calculators will now pop out in a new tab in your browser.
There are now SIX calculators: Carve Calc (for prop block dimensions), Cone Calc, Strut Calc, Safe Torque Calc, TVo-CG Calc, and Density Calc.
You can find them in the Menu Bar at the top. Eventually, they will return to the right side menu, also.