Score needed on a final to reach your target.
G = (S₁ × W₁ + S₂ × W₂ + … + Sₙ × Wₙ) / (W₁ + W₂ + … + Wₙ)
Your overall grade is the weighted average of all your category scores. Each category (e.g., Homework, Quizzes, Midterm, Final) contributes a percentage of the total grade. Multiply each category's score (as a decimal or percentage) by its weight (as a decimal), then sum all the products. The weights must add up to 100% (or 1.0 in decimal form).
If your weights do not sum to 100%, the result is divided by the total weight given, producing a normalized weighted average.
G = (88 × 20 + 75 × 15 + 82 × 25 + 91 × 40) / (20 + 15 + 25 + 40) = (1760 + 1125 + 2050 + 3640) / 100 = 8575 / 100 = 85.75%
Result: Overall Grade: **85.75%** — Letter Grade: **B**
A result of 85.75% means the student earned a B in the course. This score reflects the fact that the Final Exam (worth 40% of the grade) was the strongest performance at 91%, which boosted the overall average above the lower Quiz score of 75%. The weighted approach ensures that more important assessments have a proportionally larger impact on the final grade, unlike a simple average that would treat all scores equally.
Most courses do not treat every assignment equally. A typical college syllabus assigns different weights to different components — for example, homework might count for 20% of your grade while the final exam counts for 40%. A weighted grade reflects the relative importance each category holds in the final course grade.
A simple average adds up all scores and divides by the count. A weighted average accounts for importance. For example, if you scored 100% on a 5% homework and 60% on a 40% final, a simple average of those two scores would give 80%, which is misleading. The weighted average correctly yields a much lower final grade, closer to 65%.
Most U.S. institutions use the following standard letter grade scale:
Some schools use +/- modifiers (e.g., A-, B+), and grading scales can vary by institution or country.
Your course grade directly affects your GPA. A 4.0 scale is standard in the U.S., where an A = 4.0, B = 3.0, C = 2.0, D = 1.0, and F = 0. Use this calculator to keep track of your standing throughout the semester so you can plan study efforts accordingly.
One of the most powerful uses of this calculator is modeling what-if scenarios: 'If I score an 80% on my final, what will my overall grade be?' Simply plug in your desired final exam score and see how it affects your result before the exam.
Multiply each course's grade points (A=4.0, B=3.0, etc.) by the number of credit hours, sum all the products, then divide by total credit hours. Our GPA calculator automates this process.
An unweighted GPA uses a standard 4.0 scale regardless of course difficulty. A weighted GPA awards extra points for honors or AP classes (e.g., an A in AP class = 5.0), better reflecting academic rigor.
Use the formula: Required Final Score = (Target Grade × Total Weight Sum − Sum of Current Weighted Scores) / Final Exam Weight. Plug known values in and solve for the final exam score needed.
A curve adjusts raw scores upward — either by adding a flat number of points to everyone's score or by scaling scores so the highest grade equals 100%. Curved scores can be entered as-is into this calculator.
Weight refers to the percentage that a particular category (like homework or a final exam) contributes to your total course grade. For example, if your final exam is worth 40% of your grade, its weight is 40.
The calculator divides the sum of (score × weight) by the sum of all weights entered, giving you a normalized weighted average. This is useful when you've only completed part of the course and want to see your grade so far.
Yes! Enter all your known scores and weights, then experiment with different scores for the final exam category to see what grade you need to hit your target overall grade.
The calculator displays your numeric percentage. Whether that converts to an A- or B+ depends on your school's specific grading scale, which you should check in your course syllabus.
Absolutely. You can add as many rows as your course has — homework, class participation, lab reports, quizzes, midterms, finals, and more. Each gets its own score and weight entry.
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