How to Calculate Your Grade in a Class (Step by Step)

Your gradebook shows a number, but knowing how that number is built tells you where your effort pays off most. Almost every class in an American middle school, high school or college uses one of two methods: weighted categories or total points. Here's how each one works and how to calculate your grade by hand.

Step 1: Find out which method your class uses

Open your syllabus or your school's grade portal (PowerSchool, Infinite Campus, Skyward, Canvas and others).

• If you see percentages next to category names, like "Tests 40%, Homework 20%", your class uses weighted categories.
• If every assignment simply has a point value (10 points, 50 points, 100 points) and there are no category percentages, it's a total points class.

Step 2a: Calculating a weighted grade

In a weighted class, each category counts for a fixed share of your grade.

1. Average each category. Add the scores in the category and divide by how many there are (or divide points earned by points possible).
2. Multiply each category average by its weight.
3. Add the results and divide by the total weight of categories that have grades.

Example. Your syllabus says Homework 20%, Quizzes 30%, Tests 50%.

8,260 ÷ 100 = 82.6%, a B-.

Notice how the 95% homework average barely helps. Tests are worth more than homework and quizzes combined, so a two-point gain on your test average is worth more than a ten-point gain in homework.

The weighted grade calculator does all three steps for you. Paste the scores for each category.

Step 2b: Calculating a total points grade

This one is simpler: add up every point you've earned and divide by every point possible.

Example. Homework 18/20, Quiz 9/10, Test 84/100, Essay 43/50.

• Earned: 18 + 9 + 84 + 43 = 154
• Possible: 20 + 10 + 100 + 50 = 180
• Grade: 154 ÷ 180 × 100 = 85.6%, a B.

Big assignments dominate here. The 100-point test counts ten times as much as the quiz. Use the Total points mode of the grade calculator for these classes.

Step 3: Convert your percentage to a letter

Most U.S. schools use a 10-point plus/minus scale: 90–100 is the A range, 80–89 the B range, and so on, with the top three points of each range earning a plus and the bottom three a minus. 82.6% is a B- and 85.6% is a B. See the full grading scale for every cutoff.

Checking your grade mid-semester

Halfway through the semester, some categories (often the final exam) have no grades yet. Gradebooks handle this by dividing only by the weight that has been graded. That's why your grade can swing a lot early on: with only 40% of the course graded, each assignment carries more weight.

Example. Homework 92% (20%) and tests 80% (40%) are graded; the final (40%) isn't.

(92 × 20 + 80 × 40) ÷ 60 = 5,040 ÷ 60 = 84%

To end with a 90%, you'd need (90 × 100 − 84 × 60) ÷ 40 = 99% on the remaining 40%. The grade calculator shows this "what you need" table automatically whenever your weights add up to less than 100%.

Common mistakes

• Averaging categories without weights. If tests are 50% and homework 20%, a plain average of the two category averages is wrong.
• Forgetting zeros. A missing assignment usually counts as 0. Read how missing assignments change your grade.
• Rounding too early. Keep decimals until the end; your teacher's gradebook does.
• Assuming 89.5 rounds up. Some teachers round, many don't. Ask.

Before the final

Once the final exam is the only thing left, use the final grade calculator to see the exact score you need for each letter. If you're well above a cutoff, you may already have it locked in.