This (Bicycle Gear Calculator) is my favorite resource for toying around with gear inches and development, development being in European inches. It's an invaluable resource. Also, kudos to the poster who pointed out the derailleur capacity issue.

All too often in discussions about gearing, people seem to forget that drivetrains are systems and that derailleur capacity is a thing.

For Shimano you can get all the info you need from their product information website (https://productinfo.shimano.com/#/) either from the current section, or more likely, the archive.