Has anyone have experience with taking four classes online?

I’m considering taking four classes online this summer. Three are math classes and one is economics. This is my last summer of taking classes as I’m graduating in Spring 2021. Some of you know me that I have been in college since Fall 2014. This will be a very hard summer but its the only way for me to finish by Spring 2021.

Linear Algebra (major requried)
probability theory (major required, and I need one more statistics/probability class after this)
Partial differential equations (High math elective)
Intermediate Microeconomics (Minor, and will need two more classes to complete it)

Right now thousands of students are taking 4 classes online.

The difference in summer is the length of the term. Taking 2 course would be considered full time if it is a 6 week term. I made the mistake of taking a literature class one summer and had to read about 8 books in the first two weeks (I think it was a 4 week class). Lot of work.

Keep in mind:

You would be compressing 15 weeks into 8 weeks. (or 6 or 4)

Keep in mind that the government/accreditation assumes that for every academic hour in class, you need to do 2-3 hours of studying/reading/homework.
15 weeks/course x 3 class/week (1 hours/class + 2-3 study/homework hours/class) = 135-180 hours needed for a course
If you had 4 classes in 8 weeks, that would be around 20 hours/ class/week.x 4 classes = 80 hours/week
So no, don’t take 4 classes in 8 weeks (as was mentioned, that is full time for 15 weeks)
Take at most 2 classes and assume you will work on them 8 hours/day x 5 days/ week x 8 weeks…assume it is a full time job for 8 weeks.

I agree that as long as you consider it a full time job, keep a routine, and also ensure that the courses aren’t having synchronous lectures (meaning, you would need to be logged in at a certain time for lectures) that overlap, you can do it.