Grade Calculator

A weighted grade calculator computes your overall course grade by giving each assignment the right amount of importance. Real-world syllabi rarely treat all work equally — a final exam might be worth 30% of your grade while a quiz is worth 5% — so a simple arithmetic average gives misleading results. This tool weights each grade by its declared importance and produces the same number your professor's gradebook will show.

You can use it two ways: enter individual assignments with their own weights, or enter category averages (like "homework: 92%, weight 20") that your LMS has already computed. Both work. Add as many rows as you need, leave empty rows blank, and the calculator returns a percentage plus a letter grade on the standard 7-point scale.

Suppose your syllabus says:

• Homework (avg 88%) — worth 20%
• Quizzes (avg 92%) — worth 15%
• Midterm (scored 85%) — worth 25%
• Final project (scored 95%) — worth 40%

The weighted calculation:

• (88 × 20) + (92 × 15) + (85 × 25) + (95 × 40) = 1,760 + 1,380 + 2,125 + 3,800 = 9,065
• Total weight: 20 + 15 + 25 + 40 = 100
• Weighted grade: 9,065 ÷ 100 = 90.65% — an A-

A simple average of the four grades (88, 92, 85, 95) would be 90% — close, but not the same. Notice how the heavily-weighted final project (95%) pulls the weighted result above the simple average.

• Mid-semester check-in — see your true standing instead of guessing from individual scores.
• What-if planning — try entering hypothetical grades on remaining work to see where you'd finish.
• Verifying gradebook accuracy — recompute by hand to catch any LMS errors before grades close.
• Comparing classes — figure out which course's grade has the most upside (or risk) given remaining work.
• Setting study priorities — focus on heavily-weighted assignments where small score changes move your grade most.

• Using percentages instead of points-earned ratios. Always enter the percentage score (e.g., 18 ÷ 20 = 90%), not the raw points.
• Mixing weights and category counts. If "exams" is 40% with two equal exams, each exam is 20%, not 40%.
• Forgetting dropped grades. If your course drops the lowest quiz, exclude that row before calculating.
• Including ungraded work as a zero. Leave it out entirely until it's graded; otherwise you'll under-estimate your standing.
• Treating extra credit as a separate weight. Extra credit usually adds to your numerator without increasing the weight denominator — handle it manually.