How do I calculate what I need on my final exam to pass?

Use the required final exam formula: Required Exam Score = [Passing Target - Current Grade × (1 - Final Weight)] ÷ Final Weight. For example, if you have a 72% and need a 70% to pass with a final exam worth 25%, you need [70 - (72 × 0.75)] ÷ 0.25 = (70 - 54) ÷ 0.25 = 64%.

What formula calculates the required final exam score?

The standard formula is: Exam Score Needed = (Target Grade - (Current Grade × (100% - Exam Weight%))) ÷ Exam Weight%.

Can I still get an A if I get a B on the final?

Yes, if your current grade is high enough before the final (e.g. 94% or above), earning an 85% (B) on a final exam worth 15-20% will still keep your overall course average above 90.0% (A-).

What if the calculator says I need over 100% on the final?

Needing over 100% means that mathematically, even a perfect score on the final exam will not raise your average to the selected target without extra credit.

Final Grade Calculator

Enter your current grade, desired course grade and final exam weight to see exactly what score you need on your final.

1. Enter Your Grades & Goals

Current Course Grade (%)

Your weighted grade in the class before taking the final exam. Need to calculate it first? Use our Weighted Grade Calculator.

Final Exam Weight (%)

How much the final exam contributes to your total course grade (e.g. enter 30 if worth 30%).

Desired Overall Course Grade (%)

The final course percentage you wish to finish with after the exam.

Quick Letter Targets (Editable Defaults)

2. Calculated Result

You need to score at least

104%

on your final exam to finish with a 90% overall.

Requires score over 100%

Achieving a 90% overall grade mathematically requires 104% on the final. This is only possible if extra credit or bonus curve points are awarded.

Decision Support Metrics

Maximum possible grade (with 100% final):88.80%

Grade if you scored 0% on the final:58.80%

Existing coursework contribution:58.80%

100% Private & Client-Side. Calculations stay on your device.

What-If Final Exam Score Scenarios

Compare overall course grade outcomes for common final exam scores based on your 84% current coursework and 30% final weight.

Final Exam Score	Projected Course Grade	Letter Grade
60%	76.80%	C
70%	79.80%	C
80%	82.80%	B
90%	85.80%	B
100%	88.80%	B

How to Calculate the Final Exam Grade You Need

To determine the exact score you need on a final exam, you need three pieces of information from your syllabus: your Current Course Grade, your Target Course Grade, and the Final Exam Weight.

1. Score Needed Formula

Required Score = (Target − Current × (1 − Weight)) ÷ Weight

Where Weight is represented as a decimal (e.g. 30% weight is 0.30, and remaining coursework is 0.70).

2. Final Course Grade Prediction Formula

Final Course Grade = Current × (1 − Weight) + Final Score × Weight

Projects your final semester grade based on what you actually score on the exam.

Step-by-Step Worked Examples

Example 1: Target Over 100% (Extra Credit Needed)

Unreachable without curve

Current Grade: 84%
Target Course Grade: 90% (e.g. standard A threshold)
Final Exam Weight: 30% (decimal: 0.30)

Current coursework contribution: 84 × (1 − 0.30) = 84 × 0.70 = 58.8%

Remaining points needed: 90 − 58.8 = 31.2%

Required final exam score: 31.2 ÷ 0.30 = 104%

Interpretation: A perfect 100% on the final yields a maximum possible course grade of 58.8 + (100 × 0.30) = 88.8%. Reaching 90% is mathematically impossible without extra credit.

Example 2: Achievable Target Grade

Reachable Target

Current Grade: 80%
Target Course Grade: 85%
Final Exam Weight: 40% (decimal: 0.40)

Current coursework contribution: 80 × (1 − 0.40) = 80 × 0.60 = 48.0%

Remaining points needed: 85 − 48.0 = 37.0%

Required final exam score: 37.0 ÷ 0.40 = 92.5%

Interpretation: You need at least 92.5% on the final exam to raise your 80% current grade to an 85% final course grade.

Understanding Key Concepts & Assumptions

Which current grade should I enter?

Enter the cumulative weighted grade of all coursework completed before the final exam. If your course syllabus has multiple categories (homework, quizzes, labs, midterms), your current grade should reflect the combined weighted average of those completed categories.

If you have not yet combined your assignment categories, calculate your current standing first using our Weighted Grade Calculator.

What does it mean if my final is worth 30%?

"Final weight" represents the portion of your overall course grade determined by the final exam. If your final is worth 30%, that means 30% of your course grade comes from the final, while the other 70% is locked in from your prior coursework.

A higher final weight (e.g. 40%–50%) gives the exam greater influence to pull your grade up or down, while a lower weight (e.g. 15%–20%) provides greater grade stability.

Frequently Asked Questions

What score do I need on my final exam to pass?

First, check your course syllabus for the passing threshold (commonly 60% for a D or 70% for a C). Enter that threshold as your Desired Grade, along with your current grade and final weight, to find the exact minimum score needed.

What do I need on my final to get an A, B, or C?

Because grading scales vary by school and department, enter the specific percentage required by your teacher (e.g. 90% for an A, 80% for a B, 70% for a C). You can also click the quick preset buttons in the calculator to test standard grade boundaries.

What if the calculator says I need more than 100%?

If the required score exceeds 100%, your desired target grade cannot be reached with a standard 100% exam score. Check the "Maximum possible grade" metric in the decision support box to see the highest overall grade you can achieve.

What does "Target Already Secured" mean?

If your existing coursework points already meet or exceed your desired target, you will see "Target Already Secured". This means that even with a 0% on the final, your overall grade will remain at or above your target.

How do I predict my final course grade?

Switch to Predict Final Grade Mode at the top of the calculator. Enter your current grade, final exam weight, and expected exam score to project your total percentage and letter grade.

How much can the final exam change my grade?

Use the What-If Final Exam Score Scenarios table below the calculator. It compares course grade outcomes across 60%, 70%, 80%, 90%, and 100% exam scores so you can gauge your best-case and worst-case scenarios.