How do I figure out what my GPA will be after this semester without having to calculate every class I've taken for the past 2 years?

I see a lot of GPA calculators online, but I don’t have the time or patience to go through and enter every grade and credit hours for every class at this school.

If my total GPA is 2.76 now and I’m looking at an estimated 1.85 this semester, what would my total GPA be after this semester?

Today is the final withdrawal date and I am still debating.