Weighted Grade Calculator

Work out your class grade when homework, quizzes, tests and projects count for different amounts. Add as many categories as you need.

CategoryGrade (%)Weight (%)
Weighted average
–
Letter grade–
Total weight–

What is a weighted grade?

In most classes, not every assignment counts the same. A syllabus might say homework is 20% of your grade, quizzes 20%, the midterm 25% and the final project 35%. Your overall grade is a weighted average: each category's score is multiplied by how much it counts, then the results are added together.

How to use this calculator

  1. Add one row for each grading category in your syllabus, such as Homework or Tests.
  2. Enter your percentage grade in each category.
  3. Enter how much each category is worth.
  4. Read your weighted average and the matching letter grade below the table.

You can also add single assignments as rows, for example a 100-point test as weight 100 and a 20-point quiz as weight 20.

The weighted average formula

Weighted average = Σ(grade × weight) ÷ Σ(weight)

Multiply each grade by its weight, add those products, then divide by the sum of the weights. Dividing by the total weight means the answer is right even when the weights do not add up to exactly 100.

Worked example

CategoryGradeWeightGrade × weight
Homework92%20%18.4
Quizzes85%20%17.0
Midterm78%25%19.5
Final project88%35%30.8

The products add up to 85.7, and the weights add up to 100, so the weighted average is 85.7%, a B on a common US scale. A simple average of the four grades would be 85.75%, which looks close here, but the gap grows when one heavily weighted score is very high or very low.

Checking your grade mid-semester

Partway through the term, only some categories have grades. Enter just those categories with their weights. If homework (20%) and the midterm (25%) are graded, your total weight is 45%, and the calculator shows your current grade on that 45%. To see what you need on the remaining work, try the final grade calculator.

Common mistakes to avoid

  • Averaging category averages without weights. A 100% on homework worth 10% does not balance a 60% on a test worth 40%.
  • Mixing points and percentages. Use the same kind of weight for every row.
  • Forgetting dropped scores. If your teacher drops the lowest quiz, leave it out before working out the quiz category grade.

Last reviewed October 2026.

Frequently asked questions

What if my weights do not add up to 100%?

The calculator divides by the total weight you entered, so the answer is still correct for the work that has been graded. This is useful mid-semester: if only 60% of the course has been graded, enter those categories and you will see your current grade on that 60%.

What is the difference between a weighted and a regular average?

A regular average treats every score the same. A weighted average lets some scores count more than others. If your final exam is worth 40% and homework 10%, a weighted average makes the exam four times as important as homework, just like your teacher's gradebook.

Can I use points instead of percentages?

Yes. Enter the points each category is worth as its weight, and your percentage score in that category as the grade. Because the calculator divides by the total weight, points work exactly like percentages.

How do I calculate a category grade first?

Add up the points you earned in that category and divide by the points possible. For example, quizzes of 8/10, 9/10 and 7/10 give 24/30 = 80%. Use 80 as the grade for the quiz category.

Can this calculate my GPA?

Not directly. GPA uses grade points (such as 4.0 for an A) weighted by credit hours. You can still use it by entering each course's grade points as the grade and its credit hours as the weight.