Final / Weighted Grade Calculator

Most classes grade by weighted categories: homework might be 20% of your grade, quizzes 20%, the midterm 25% and the final 35%. This calculator combines your scores in each category into your overall grade, as a percentage and a letter, and shows how much of the class has been graded so far.

How to Use It

1. Add a row for each category on your syllabus, with its weight (the percentage it’s worth).
2. In Scores, enter every score you have in that category, out of 100, separated by commas or spaces: 88, 92, 79.
3. Leave the scores blank for anything not graded yet, like a final you haven’t taken.
4. Press Calculate. The result updates as you add scores.

If your teacher gives scores as points (45 out of 50), turn each into a percentage first: $45 \div 50 \cdot 100 = 90$.

How It Works

Each category’s scores are averaged first. Then each average counts in proportion to its weight:

Dividing by the weight of only the graded categories is what makes a mid-term result honest: if only homework and one quiz are graded, your grade is based on those, not dragged down as if the rest were zeros. Once every category is graded and the weights total 100%, it’s your full course grade.

The letter grade uses the common plus/minus scale: 93 and up is an A, 90–92 an A−, 87–89 a B+, and so on down to below 60 for an F.

Worked Example

A syllabus weights Homework 20%, Quizzes 20%, the Midterm 25% and the Final 35%. So far a student has homework scores of 95, 88 and 100, quiz scores of 82 and 76, and an 84 on the midterm:

• Homework average: $(95 + 88 + 100) \div 3 \approx 94.3$
• Quizzes average: $(82 + 76) \div 2 = 79$
• Midterm: 84

The graded categories cover $20 + 20 + 25 = 65\%$ of the class, so the grade is $(94.3 \cdot 20 + 79 \cdot 20 + 84 \cdot 25) \div 65 \approx$ 85.6%, a B, with the 35% final still to come.

Tips and Common Mistakes

• Check whether your class uses weights at all. Some teachers use total points (every assignment’s points added up and divided by the points possible). If so, a weighted calculation won’t match.
• Dropped scores: if your teacher drops your lowest quiz, leave that score out.
• Extra credit can push a category above 100. Enter it the way your teacher records it.
• The final exam’s weight matters most at the end. To see what you need on it, use the Final Exam Grade Calculator.
• Rounding rules differ. An 89.5 might round to an A− in one class and stay a B+ in another. Your teacher’s gradebook is the official number.