Hi, Christopher!
I'm so glad you're visiting the
Disneyland Resort for two full days! You're going to have so much fun. I love that you will have the time to enjoy the attractions while also taking in the special details that make the Disneyland Resort so unique.
You can upgrade your ticket at the gates as long as there's availability and capacity at the theme parks. The upcharge for a
Park Hopper ticket is a fixed fee that doesn't change if you apply it towards multiple days or a single day, and it's currently around sixty dollars plus tax. Since prices can change without further notice, it's always best to ask the Cast Members in person once you get there.
Don't forget to apply
Genie+ to your ticket once you enter the theme parks, Christopher. I find it especially useful when I have Park Hopper tickets, as it gives me more options to access attractions through Lightning Lanes!
May the magic be with you,
Julie