How much can your GPA go up from the end of junior year until ED applications?

Answered

There is no simple answer to your questions because each HS puts a different weight on AP classes and you provide no context for your question. You don't provide your GPA, UGPA, and how many weighted classes you already took and what your grades were, and how your HS treats AP classes. Some HSs do not weigh AP classes so if you have a 4.0 for the 1st 3 years of HS, you will still have a 4.0 during senior year. Other schools weigh AP classes 10% more some 25% more. For instance, if you are on a 100.00 scale, some HS's give you a 110.00 for an AP class. If you are on a 4.0 scale, some HS's give you a 4.5 or a 5.0 for an AP class. Taking all AP classes won't make much difference in 1 reporting period if you already have a 4.0 and took a lot of AP classes already. (maybe an extra 1/10th or 2/10ths) It makes more of a bump if you have little or no AP classes and a lower GPA to start with.

It won't go up and it can't unless your school recalculates your goal before ED applications. Your GPA at the end of junior year will be used otherwise. By regular decision time though, you should have a recalculated GPA based on senior grades from the first half of the year.