Made a free site with 43 machinist calculators

The website is live at app.calculatecnc.me if you want to try it out.

It has the usual stuff (speeds and feeds, bolt circles, drill charts) plus many tools I wanted to add, or that were custom built for my own work: a box packing calculator, an insert decoder for turning tools, and a parts-per-bar calculator. Also thread wire calculators, drill point depth, etc.

No account, no login, and it works offline once it's loaded. There's also an iOS app (link on site) if you'd rather have it that way and support the project (Android eventually).

If anyone finds a number that disagrees with your Machinery's Handbook or a controlling standard, tell me and I'll fix it. That's genuinely useful to me.