Grade Calculator

How to Use the Grade Calculator

Enter the percentage score and weight for each assignment, exam, or category. The weight represents how much that component counts toward your final grade. For example, if midterm exams are worth 30% of your grade and you scored 88%, enter 88 as the score and 30 as the weight. The calculator processes up to six assignments and updates results in real time. Rows with zero weight are excluded automatically.

The calculator computes a weighted average by multiplying each score by its weight, summing the products, and dividing by the total weight. It then maps the result to the standard US letter grade scale. This approach works whether your weights add to exactly 100% or not, making it flexible for partial-semester grade checks.

Understanding Weighted Grades

Most courses use weighted grading, where different assignment categories count for different percentages of your final grade. A typical breakdown might be: homework 20%, quizzes 15%, midterms 30%, final exam 25%, and participation 10%. Understanding the weights helps you prioritize your study time. A 5-point improvement on a category worth 30% of your grade has three times the impact of the same improvement on a 10% category.

Planning for Your Target Grade

To figure out what you need on remaining assignments, start by entering your completed scores and weights. Note the weighted average and the total weight accounted for. The remaining weight represents upcoming assignments. You can then estimate what scores you need on those future assignments to reach your desired overall grade. This is a powerful planning tool during the semester.

Common Grading Scales

While this calculator uses the standard US grading scale (A through F with plus and minus modifiers), some institutions use different systems. Pass/fail courses, percentage-only systems, and 10-point scales are also common. Some high schools weight honors and AP courses on a 5.0 scale. Always verify your school's specific grading policies when evaluating your performance.

Frequently Asked Questions

How do I calculate my weighted grade?

Multiply each assignment score by its weight (as a percentage), sum all the products, then divide by the total weight. For example, if you scored 85% on an exam worth 40% and 92% on homework worth 60%, your weighted average is (85 x 40 + 92 x 60) / (40 + 60) = (3400 + 5520) / 100 = 89.2%.

What is a weighted average?

A weighted average accounts for the relative importance of each component. Unlike a simple average where all items count equally, a weighted average gives more influence to components with higher weights. In grading, this means a final exam worth 40% of your grade has more impact than a quiz worth 5%.

How are letter grades determined?

Letter grades are typically assigned using a standard scale: A+ (97-100), A (93-96), A- (90-92), B+ (87-89), B (83-86), B- (80-82), C+ (77-79), C (73-76), C- (70-72), D+ (67-69), D (63-66), D- (60-62), and F (below 60). Some schools use slightly different cutoffs.

What grade do I need on my final to get an A?

Use the formula: Required Score = (Desired Average x Total Weight - Current Weighted Sum) / Final Exam Weight. For example, if your current average before the final is 88% on 70% of the total weight and you want a 90% overall, you need (90 x 100 - 88 x 70) / 30 = (9000 - 6160) / 30 = 94.7% on the final.

Do all my assignment weights need to add up to 100%?

Ideally yes, but the calculator works regardless. If your weights total more or less than 100%, the calculator divides by the actual total weight to compute the correct average. For example, weights of 30, 30, and 30 (totaling 90) will still give an accurate weighted average based on those proportions.