Grade Calculator

Enter each assignment, quiz or exam with the score you got and the weight it carries toward the final grade. The calculator returns your current weighted percentage, the letter grade, and how much weight remains.

Enter your scores and weights, then press Calculate grade.

The weighted-grade formula

A weighted grade multiplies each score by its weight, sums those, and divides by the total weight used:

grade = Σ ( score × weight ) ÷ Σ weight

If your weights add up to less than 100% (because some assignments haven't happened yet), the calculator grades you on the weight completed so far, and shows how much weight is still outstanding.

Worked example

Homework 92% (weight 20), Midterm 85% (weight 30), Final 78% (weight 50):

Weighted points: (92×20) + (85×30) + (78×50) = 1840 + 2550 + 3900 = 8290.
Total weight: 20 + 30 + 50 = 100.
Course grade: 8290 ÷ 100 = 82.9% → a B−.

A common US letter-grade scale

PercentageLetterPercentageLetter
93–100A73–76C
90–92A−70–72C−
87–89B+67–69D+
83–86B63–66D
80–82B−60–62D−
77–79C+Below 60F
Note: grading scales and cut-offs vary by school and instructor. Check your syllabus for the exact bands; this calculator uses a common US scale and weighted-average method.

Frequently asked questions

How is a weighted course grade calculated?

Multiply each assignment's score by its weight, add those products, and divide by the total of the weights. An item worth 50% of the grade counts five times as much as one worth 10%.

What if my weights don't add up to 100%?

The calculator grades you on the weight completed so far and tells you how much remains. That's useful mid-semester to see your standing before the final exam counts.

How do I convert a percentage to a letter grade?

Most US schools use bands such as 90–100 A, 80–89 B, 70–79 C, 60–69 D, below 60 F, often with +/− at the edges. This tool applies a common scale, but always check your syllabus.

How is this different from GPA?

A grade is your percentage in one course. GPA converts letter grades across courses to 4.0-scale points and averages them by credit hours. For that, use the GPA Calculator.

MB
Mustafa Bilgic · Editor, Calcool
The weighted-average method is standard; letter-grade cut-offs vary by institution, so the scale shown is a common US convention, not a universal rule. For converting grades to a 4.0-scale GPA, see the GPA Calculator.

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