So I made a little inch-decimal-metric conversion chart to help me remember stuff. It also has Ohm’s Law. It will be on this page permanently in PDF form but I may update the chart or page as time goes on.
And here’s a bunch of printable charts from Bolt Depot.
And here’s a link to the Engineering Toolbox. It has a bazillion charts, calculators, formulas, and other info on about anything you can think of in design and engineering. I use this site a lot.
If you have any suggestions for this page or the chart, let me know!