Final Grade Calculator

Step 1: Enter your current grade as a percentage in the "Current Grade" field. This is your grade in the class before the final exam (e.g., 85%).

Step 2: Enter your final exam's weight as a percentage in the "Final Exam Weight" field. This is how much the final counts toward your total grade (e.g., 30%).

Step 3: Enter the overall grade you want to achieve in the "Desired Final Grade" field (e.g., 90% for an A-).

Step 4: Click "Calculate" to see exactly what score you need on your final exam to reach your desired grade.

Step 5: If the result is above 100%, you'll need extra credit or should consider adjusting your target grade. You can also switch to the "Grade Calculator" tab to calculate weighted averages for individual assignments.

Your final grade in a course is a weighted average of all your graded work. The final exam typically carries a heavier weight than individual assignments — commonly 20% to 40% of your total grade.

The formula works backwards from your desired outcome: knowing your current grade (everything except the final), the weight of the final exam, and your target grade, you can solve for exactly what score you need on the final.

This is one of the most commonly searched academic calculations during finals week. Students use it to prioritize their study time — if you need a 95% on one final but only a 60% on another, you know where to focus.

The calculator handles the math: Final Score Needed = (Desired Grade - Current Grade × (1 - Final Weight)) ÷ Final Weight. If the result exceeds 100%, it means your target grade may not be achievable through the final exam alone.

What You Need on the Final:

Final Score Needed = (Desired Grade − Current Grade × (1 − Final Weight ÷ 100)) ÷ (Final Weight ÷ 100)

Example:
- Current grade: 85%
- Final exam weight: 30%
- Desired grade: 90%

Final Score Needed = (90 − 85 × 0.70) ÷ 0.30
= (90 − 59.5) ÷ 0.30
= 30.5 ÷ 0.30
= 101.67%

In this case, you'd need over 100% — meaning a 90% final grade isn't achievable without extra credit.

Adjusting the target to 88%:
Final Score Needed = (88 − 85 × 0.70) ÷ 0.30 = (88 − 59.5) ÷ 0.30 = 95%

A 95% on the final would get you an 88% overall — much more realistic.

Example 1: Need an A
You have a 91% in the class. The final is worth 25%. You want a 93% (A). Score needed: (93 - 91 × 0.75) / 0.25 = (93 - 68.25) / 0.25 = 99%. Tough but possible!

Example 2: Just Need to Pass
You have a 62% in the class. The final is worth 35%. You need a 70% (C) to pass. Score needed: (70 - 62 × 0.65) / 0.35 = (70 - 40.3) / 0.35 = 84.86%. Very achievable with solid studying.

Example 3: Protecting Your Grade
You have a 95% and want to keep your A (93%). The final is worth 30%. Minimum score needed: (93 - 95 × 0.70) / 0.30 = (93 - 66.5) / 0.30 = 88.33%. You have a comfortable cushion.

Run this calculator for every class. Before finals week, calculate the score you need in each class. This tells you where to spend your study time — a class where you need a 95% needs more prep than one where a 60% will do.

Know the difference between 'current grade' and 'grade before the final.' Your current grade should be your weighted average on all work completed so far, excluding the final. If your teacher hasn't posted recent assignments, estimate conservatively.

Factor in your professor's grading curve. If your professor curves final exam scores, you may need a lower raw score than the calculator shows. Ask if there's been a curve on previous exams in the course.

Consider the minimum vs. target approach. Instead of only calculating what you need for your ideal grade, also calculate the minimum score to keep an acceptable grade. Knowing you can't drop below a B even with a 70% on the final reduces exam anxiety significantly.