Grade Calculator

Knowing your current grade throughout the semester is essential for academic success. This calculator computes your weighted average across all assignments, tells you your letter grade, and helps you figure out exactly what you need on your final exam to reach your goal.

How weighted grades work: Most courses assign different weights to different types of work. For example, homework might be 20% of your grade, midterms 30%, and the final exam 50%. A weighted grade multiplies each score by its weight, sums the results, and divides by the total weight. This means a high score on a heavily weighted exam has more impact than a perfect homework assignment.

Understanding the formula: If you scored 92% on homework (weighted 20%) and 78% on the midterm (weighted 30%), your weighted average so far is: (92 x 20 + 78 x 30) / (20 + 30) = (1840 + 2340) / 50 = 83.6%. This accounts for only 50% of your total grade, with the final exam making up the remaining 50%.

The final exam question: The most common question students ask is "What do I need on the final?" This calculator answers that directly. Given your current grade, your target, and the final's weight, it computes the exact score required. The formula is: Required Score = (Target x 100 - Current Grade x Current Weight) / Final Weight.

Letter grade scale: The standard US grade scale maps percentages to letters: 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), F (0-59). Note that some schools use slightly different cutoffs — always check your syllabus.

Tips for grade management: Enter your grades as you receive them throughout the semester. This gives you a running average so you can identify early if you're falling behind. Focus your study effort on heavily weighted components — improving your exam score by 5 points has a much bigger effect than improving a homework score by the same amount if the exam is weighted more heavily.

Common grading systems: While this calculator uses the standard percentage-based system, some courses use point-based grading (e.g., each assignment is worth a certain number of points). To convert, simply treat the points as weights. A 100-point exam and a 50-point homework set would be weighted 100 and 50 respectively.

Extra credit and curves: If your professor offers extra credit, you may score above 100% on individual assignments. This calculator handles scores above 100. For curved grades, enter the curved score rather than the raw score for accurate results.