Final Grade Calculator
Determine the score required on your final exam to lock in your desired target letter grade for a class.
Understanding Final Grade Requirements
The final exam is often the most stressful component of a class, frequently carrying a high percentage weight (typically 15% to 30% of your overall grade). A final grade calculator helps remove the guesswork, letting you calculate exactly what score you need on the final exam to achieve your target course grade. This calculation uses basic algebra to solve for the missing grade variable based on your current standing and the exam's weight.
Knowing your target score lets you plan your study schedule effectively. If you only need a 60% on your chemistry final to maintain an 'A', you can spend more time studying for your calculus final, where you might need a 92%. If you want to log your category scores first, use our Weighted Grade Calculator.
The Final Exam Formula
The formula for finding the required final exam grade is derived from the standard weighted average formula, rearranged to solve for the unknown exam score.
Required Exam Grade Formula:
* Note: Express the Final Exam Weight as a decimal (e.g. 20% = 0.20) in this formula.
Step-by-Step Final Exam Example
Imagine you have the following grades:
• Current Grade: 85.00%
• Target Grade: 90.00% (A-)
• Final Exam Weight: 20.00% (or 0.20)
Math: (90.00 − (85.00 × (1 − 0.20))) / 0.20
Math: (90.00 − (85.00 × 0.80)) / 0.20 = (90.00 − 68.00) / 0.20
Required Final Score: 22.00 / 0.20 = 110.00%
Want to see how your course grade converts to a GPA?
Check out standard letter grade decimal points and GPA calculations.
Frequently Asked Questions
What does it mean if the required score is over 100%?
If the calculator indicates you need a score greater than 100% (like 110% in the example above), it means it is mathematically impossible to achieve your target grade with your current scores, even if you get a perfect 100% on the final. You would need extra credit opportunities to reach your goal.
What does it mean if the required score is negative?
A negative required score (such as -15%) means that your current grade is so high that you have already secured your target grade. You could theoretically score a 0% on the final and still achieve your target class grade.
How does the weight of the final exam affect the required score?
The higher the weight of the final exam, the more it can change your grade. A high final weight (e.g. 30%) gives you a better opportunity to pull up a low grade, but it also means a bad score will drop your grade significantly.