How to Calculate Your Grade Average: 3 Methods + Examples
By Smart Grade Calculator Editorial Team · Updated · ~8 min read
Table of contents
Your grade average is one number that sums up how you are doing in a class. But there are three different ways teachers build that number. If you use the wrong one, your answer can be off by several points. This guide shows all three, with real numbers, so you can match the method to your syllabus.
Simple average: every score counts the same
Use this when your teacher says every test or assignment is worth the same. Add up your scores. Then divide by how many scores you have.
Average = (sum of scores) ÷ (number of scores)
Example: four tests of 78, 85, 92 and 88. The sum is 343. Divide by 4 and your average is 85.75%. If you just want a test average, our test score calculator does this in one step.
Points-based classes: total earned ÷ total possible
Many classes use points instead of percents. A quiz might be out of 20, a lab out of 50 and a test out of 100. Here, bigger assignments count more on their own, because they have more points.
Grade = (points earned) ÷ (points possible) × 100
Example: 18/20 on a quiz, 45/50 on a lab and 88/100 on a test. You earned 151 of 170 points. 151 ÷ 170 = 88.8%.
Notice what happens if you average the percents instead: 90%, 90% and 88% average to 89.3%. That is wrong for a points class, because the test (worth 100 points) should pull harder than the quiz (worth 20). Always add the raw points first.
Weighted average: when categories have percents
Most middle school, high school and college classes list category weights in the syllabus. For example: tests 40%, quizzes 20%, homework 25% and participation 15%. To get your overall grade, find your average in each category first. Then multiply each one by its weight and add them up.
Overall grade = Σ (category average × weight)
| Category | Your average | Weight | Points toward grade |
|---|---|---|---|
| Tests | 81% | 40% | 32.4 |
| Quizzes | 90% | 20% | 18.0 |
| Homework | 96% | 25% | 24.0 |
| Participation | 100% | 15% | 15.0 |
| Total | 100% | 89.4% |
A simple average of those four numbers would be 91.75%. The real grade is 89.4%, because tests are your lowest category and they carry the most weight. For a deeper walk-through, see how to calculate a weighted grade, or enter your numbers in the weighted grade calculator.
Your average before every category is graded
Early in the term, some categories may be empty. Maybe there is no participation grade yet. Do not count an empty category as zero. Instead, divide by the weights you actually used.
Example: only tests (81%, weight 40%) and homework (96%, weight 25%) are graded so far. (81 × 0.40 + 96 × 0.25) ÷ (0.40 + 0.25) = 56.4 ÷ 0.65 = 86.8%. That is your current standing. This is also how most online gradebooks show a grade mid-semester.
Turning your average into a letter grade
Most US schools use this scale. Your syllabus may differ by a point or two, so check it.
| Percent | Letter | GPA points (4.0 scale) |
|---|---|---|
| 90–100 | A | 4.0 |
| 80–89 | B | 3.0 |
| 70–79 | C | 2.0 |
| 60–69 | D | 1.0 |
| Below 60 | F | 0.0 |
Schools that use plus and minus grades split each band. For example, 87–89 is often a B+ (3.3) and 80–82 a B− (2.7). The grade converter shows the full plus/minus scale.
Your average vs the class average
"Class average" can mean two things. For you, it is your overall grade in one class. For a teacher, it is the average of every student's score on a test or in the course.
To find a teacher-style class average, add every student's score and divide by the number of students. If 30 students score a total of 2,460 points on a test, the class average is 2,460 ÷ 30 = 82%. Teachers use this to decide on curves, and students use it to see how they compare. If you want to know where you stand across your whole grade level, see our guide on how to calculate class rank.
Common mistakes to avoid
- Averaging percents in a points class. Add the raw points first, then divide.
- Ignoring weights. A 100% on homework worth 10% cannot fix a weak test grade worth 50%.
- Counting empty categories as zero. Leave them out until they are graded.
- Forgetting dropped scores. If your teacher drops the lowest quiz, remove it before you average.
- Rounding too early. Keep one decimal place until the very end.
Once you know your average, the next question is usually what you need on the final. Our final grade calculator answers that in seconds.
Find your grade average now
Enter your scores and weights and see your overall grade instantly:
FAQ
- How do I calculate my average grade?
- If every score counts the same, add your scores and divide by how many there are. If your class uses points, divide total points earned by total points possible. If categories have percent weights, multiply each category average by its weight and add the results.
- How do I calculate my overall grade in a class?
- Check your syllabus for category weights. Find your average in each category, multiply it by the category weight as a decimal, and add the results. Example: 81×0.40 + 90×0.20 + 96×0.25 + 100×0.15 = 89.4%.
- Should I average percents or add up points?
- It depends on how your teacher grades. In a points-based class, add the raw points first and then divide. Averaging the percents gives small assignments too much influence and can be off by a point or more.
- What is a good grade average?
- On the common US scale, 90% or higher is an A, 80–89% is a B and 70–79% is a C. A B average (about a 3.0 GPA) is solid for most students, while competitive colleges and scholarships often look for an A- average or higher.
- How do I find the class average for a test?
- Add every student's score and divide by the number of students. For example, 30 students with a combined 2,460 points have a class average of 82%.