I would greatly appreciate this too! I've even thought about making my own post about it but never got around to it
https://www.geogebra.org/classic/wg83gxjc is a great resource but a very tedious process, and lately I've noticed for a lot of games where you can't change FOV, the FOV box in the calculator becomes grayed out and I can't use my calculated FOV to convert from/to other games that way either.