Final Grade Calculator

This calculator helps you figure out what score you need on your final exam to achieve a specific final grade in your course.

Formula Used:

Final Exam Score Needed = (Desired Grade - (Current Grade × (1 - Final Exam Weight))) ÷ Final Exam Weight

Where:

• Desired Grade = the final grade you want in the course (as a percentage)
• Current Grade = your current grade before the final exam
• Final Exam Weight = how much the final counts toward your total grade (as a decimal, e.g., 20% = 0.20)

Example:

Let’s say:

• Your current grade is 85%
• The final exam is worth 30% of your total grade
• You want a final course grade of 90%

Step-by-step:

1. Convert final exam weight to decimal:
   30% → 0.30
2. Plug into the formula:

Final Exam Score = (90 - (85 × (1 - 0.30))) ÷ 0.30
                  = (90 - (85 × 0.70)) ÷ 0.30
                  = (90 - 59.5) ÷ 0.30
                  = 30.5 ÷ 0.30
                  = 101.67

You’d need a 101.67% on the final exam to get a 90% final grade – so it might be time to aim for something a bit more realistic or talk to your teacher!