How many days will it take to do everything in Disneyland, Star Wars Galaxy's edge and California Adventure?

I would say to to get a 3 day park hopper pass to do everything you need to do

I'd recommend at least two days at Disneyland, one day at California Adventure. If you want to experience every ride and every single thing about Galaxy's Edge, then maybe do three days at Disneyland - but California Adventure is still doable in one day. Just take advantage of the early entry on "Magic Mornings."

At least 2 or more. My wife and I thought we could tackle both in 1 day. We hit everything we wanted but left a lot on the table. 2 days for a couple without kids. If you're bringing the munchkins plan for at least 1 extra day. Amended: after wife said "No add 2 days for kids" use your best judgement I say.