Show HN: Simple tool to hang your art at museum height

I recently found out about a concept called 'Museum Height' for hanging art, where the center-line of a piece or a group of pieces is at 57 inches (144cm), which is average eye level. I love the effect, but I hate doing all the measurement and math to make sure that I'm putting the nail at the right height. This made it so I'd always delay hanging art on my walls.

I started with a spreadsheet and some formulas, but kept feeling the itch to make an app. Welp, here it is! It's super simple, and I wrote it as a literal single html page app with jquery out of nostalgia for simpler times. The code is awful, but it was fun to write and unlike a lot of modern frameworks I think this page will work even as the sun consumes the earth. Bonus: All state is stored in the URL so you can send others your measurements easily.

Please let me know what you think and if it helped you hang that piece of art that's been sitting on the floor for way too long!