Use the percentage behind the letter. Your course syllabus says which percentages earn which letters, because each teacher or school sets their own scale.
What if the final is split into parts?
Add up the shares of every part still to come, and treat them as one final. The score you need is then the average you need across those parts.
How do I work out my overall GPA?
Once you have your course grades, our GPA calculator works out your semester or cumulative GPA on a 4.0 scale.
Disclaimer: results are estimates for planning only and are not tax, legal or financial advice. Rules and rates vary by country, state and personal situation. Check with a qualified accountant before making decisions. Read the full disclaimer.