Weighted Grade Calculator
Practice and calculate weighted grade with our free tool. Includes worked examples, visual aids, and learning resources.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Weighted Average = Σ(Weight × Score) / Σ(Weights)
Multiply each category's score by its weight percentage, sum all the products, then divide by the sum of the weights. When weights sum to 100%, the divisor is 1 and the weighted sum is the final grade.
Worked Examples
Example 1: Standard Course Weighting
Problem:A course has: Homework (25%, scored 95%), Quizzes (15%, scored 88%), Midterm (25%, scored 82%), Final (35%, scored 79%). Calculate the weighted average.
Solution:Homework: 0.25 × 95 = 23.75\nQuizzes: 0.15 × 88 = 13.20\nMidterm: 0.25 × 82 = 20.50\nFinal: 0.35 × 79 = 27.65\nWeighted Average = 23.75 + 13.20 + 20.50 + 27.65 = 85.10%
Result:Weighted average: 85.10% (B, GPA 3.0)
Example 2: Exam-Heavy Course
Problem:A course has: Participation (10%, scored 100%), Midterm (40%, scored 72%), Final (50%, scored 68%). What is the weighted grade?
Solution:Participation: 0.10 × 100 = 10.0\nMidterm: 0.40 × 72 = 28.8\nFinal: 0.50 × 68 = 34.0\nWeighted Average = 10.0 + 28.8 + 34.0 = 72.8%
Result:Weighted average: 72.80% (C-, GPA 1.7)
Frequently Asked Questions
What is a weighted grade?
A weighted grade accounts for the relative importance of each assignment category. Instead of treating all scores equally, each category (homework, exams, projects) is assigned a weight percentage reflecting its importance. A 95% on homework worth 10% of your grade contributes less than an 80% on a final exam worth 40%.
How do I calculate a weighted average?
Multiply each category's score by its weight (as a decimal), then sum all the products. For example: Homework (20% weight, 90% score) = 0.20 x 90 = 18. Exams (80% weight, 75% score) = 0.80 x 75 = 60. Weighted average = 18 + 60 = 78%. Make sure all weights add up to 100%.
How do weighted grades differ from unweighted grades?
Unweighted grades treat all assignments equally — each score has the same impact regardless of importance. Weighted grades assign different importance levels. In an unweighted system, a quiz and a final exam each count the same. In a weighted system, the final might count 10 times more than a quiz.
How do I convert a weighted average to a letter grade?
Most schools use a standard scale: A (93-100%), A- (90-92%), B+ (87-89%), B (83-86%), B- (80-82%), C+ (77-79%), C (73-76%), C- (70-72%), D (60-69%), F (below 60%). Some institutions use different cutoffs, so always check your school's specific grading policy.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy