most of these questions have been answered already (search is the problem, not the askers)
Going through the beginner category, a large fraction of questions have a good answer in an older thread.
Not a complaint about people asking. It's a discoverability problem and it's the app's to solve, not the asker's.
Things that would help: search that surfaces threads as you type a title, a related discussions block on the thread page, and linking canonical answers from the compound pages. The last one is the biggest. The units thread should be linked from the calculator, not findable only by searching the forum.