Grade Calculators
What you need on the final, and what your GPA actually is.
Two calculators for the arithmetic every student does badly under pressure. Both show the working, so you can check the school's own numbers rather than take them on trust.
Final grade calculatorThe exam score you need to hit a target
GPA calculatorWeighted and unweighted, credit-adjusted
These use the most common US conventions. Grading schemes vary by school and by course — check yours against the syllabus before relying on a number.