Copy this to a text file, save, then rename the Text file "Speeds&Feeds.html" or whatever you want. Then when you double click it it will open just the calculator and not all the add junk.
<a class="cpn_l" href="https://www.custompartnet.com/calculator/milling-speed-and-feed">Milling Speed and Feed Calculator</a> <script type="text/javascript" src="https://www.custompartnet.com/gembed/milling-speed-and-feed.js"></script>
Some things are meant to be closed. Your mind isn't one of them.
