From what I read, a welding helmet rated @ +14 will work just fine. Many moons ago (there’s a joke in there somewhere) we were told to make a hole in a box. Put your back to the sun and point the hole towards the sun. The eclipse image should appear on the other side of the box. I’m guessing I got a cloudy day. Didn’t see a thing.
Went Lowe’s and they were all out of any welding glasses, goggles, and other eye protection. Every type they had online was only rated at #5.