Grade Average Calculator

Calculate your weighted average percentage grade across up to 6 assignments or exams.

🧮

Enter your values and click Calculate

Most courses grade on a weighted system: a final exam counts more than a weekly quiz, and a research paper counts more than a participation score. Averaging raw scores without accounting for weights produces a misleading picture of your standing. This calculator computes a true weighted grade average by multiplying each score by its assigned percentage weight and dividing by the total weight. Weights do not need to sum to 100 — the calculator normalizes automatically, so you can include just the graded items you have received and get an accurate current average. Toggle optional items on and off to model how future assignments will affect your final grade, or to exclude categories you have not yet been graded on.

How It Works

Weighted average = Σ(score × weight) ÷ Σ(weights). For each active item, the percentage score is multiplied by its percentage weight to produce a weighted contribution. All weighted contributions are summed, then divided by the sum of all active weights. Crucially, the denominator is the total of entered weights, not necessarily 100. This means if you enter weights of 20, 30, and 20 (summing to 70), the calculator still gives the correct weighted average for those three components. A letter grade is then assigned based on the standard US grading scale: A ≥ 93%, A− ≥ 90%, B+ ≥ 87%, and so on down to F below 60%.

Examples

Typical University Course
Two midterms (20% each), homework (30%), final (30%): scores 88, 74, 82, 91.
Result: Weighted average ≈ 84.6% — B.
High-Stakes Final
Homework 40% (95 score), midterm 25% (78 score), final 35% (88 score).
Result: Weighted average ≈ 88.7% — B+.
Partial Semester
Three graded items so far — quiz (10%), lab (20%), midterm (30%): scores 90, 85, 76.
Result: Current weighted average ≈ 81.0% — B−.

Frequently Asked Questions

Do weights need to add up to 100%?
No — the calculator divides by the total weight you enter, not by 100. This means you can enter just the items you have been graded on and get your correct current average, even if those items don't account for the entire course.
What if I have not received a grade yet?
Leave that item toggled off, and it will be excluded from both the numerator and denominator. Once you receive the grade, toggle it on and enter the score to see the updated average.
How is the letter grade determined?
The calculator maps percentage averages to letter grades on the common US scale: A ≥ 93%, A− ≥ 90%, B+ ≥ 87%, B ≥ 83%, B− ≥ 80%, C+ ≥ 77%, C ≥ 73%, C− ≥ 70%, D ≥ 60%, and F below 60%. Some schools use slightly different cutoffs.

Related Calculators

life✨

GPA

Calculate your weighted GPA across up to 6 courses using letter grades and credit hours.

Calculate →