Grade Calculator
What Is the Grade Calculator?
The grade calculator computes your current weighted average grade for a course. Enter up to 30 grades, either as percentages or as letter grades, add optional weights, and the tool returns your overall average grade as a percentage with the matching letter.
It answers the question every student asks mid semester: standing where I am now, what is my grade in this class? Because most courses weight a final exam more heavily than a homework set, a plain average of your scores is misleading, and this calculator applies the real weights.
How to Calculate a Weighted Course Grade
A weighted average multiplies each grade by its share of the course total and sums the results. If homework is 20 percent, a midterm is 30 percent, and the final is 50 percent, then scores of 92, 85, and 88 produce 92 times 0.2 plus 85 times 0.3 plus 88 times 0.5, which is 88.1 percent overall.
Leave the weight fields empty and the calculator takes a simple unweighted mean of the grades you entered, dividing the sum by the number of grades. Mixed inputs are supported: type letter grades such as A, B plus, or C minus in some rows and numeric percentages in others, and each letter converts through the standard scale automatically.
Letter Grade Conversions
The tool follows the common United States scale in which 60 percent is the passing floor and the range from 60 to 100 divides evenly among passing letters: A starts at 93, A minus at 90, B plus at 87, B at 83, B minus at 80, C plus at 77, C at 73, C minus at 70, D plus at 67, D at 65, and D minus at 62, with anything below 60 recorded as an F.
Schools vary around the edges, especially at C plus and D boundaries, so treat the conversion as the standard convention rather than a guarantee. What matters for your own course is the percentage, which the calculator always outputs alongside the letter.
Common Ways Students Use This Tool
The first use is a running grade check: enter graded work so far with its weights and see exactly where you stand before the final. The second is what if planning, replacing a known score with a candidate final exam grade to see how different outcomes move your average.
The third is checking teacher math on a syllabus, since weights occasionally do not sum to 100 and errors surface immediately once you total the weights. Whatever the task, keeping your graded papers in one list makes the calculation a two minute job.
Frequently Asked Questions
How do I calculate my grade in a class?
Multiply each of your graded scores by its weight in the course, add the results, and divide by the total weight used. The calculator does this automatically once you enter the scores and optional weights.
Can I enter letter grades instead of numbers?
Yes. Type letters such as A, B plus, or C minus directly, and the calculator converts them to the standard percentage equivalents before averaging.
What happens if I leave the weights empty?
The calculator averages the grades equally, so each entry counts the same amount. Use weights only when your syllabus assigns different values to different assignments.
What percentage is an A?
On the common scale, an A starts at 93 percent and A plus at 97 percent, while an A minus covers 90 to 92 percent. Below 60 percent is an F.
Do the weights need to add up to 100?
For a complete course they should. If your weights sum to less than 100, the missing share belongs to ungraded work, and you can enter the remaining grading items later for an accurate current average.