Grade Calculator
Find out exactly what you need on the final — or compute your weighted grade across categories.
Calculate
| Category | Your score (%) | Weight (%) | |
|---|---|---|---|
Weights should add up to 100% — yours add up to %.
How to Use the Grade Calculator
Two modes, one page. "What do I need?" answers the question every student asks before finals week: enter your current grade, how much the final is worth, and the grade you're aiming for — the calculator tells you the exact final-exam score required, plus an honest verdict. "Weighted categories" is your digital gradebook: list each category (homework, quizzes, tests…) with its score and weight to see your current standing. One-click presets load typical high school or college breakdowns so you don't start from a blank table.
How Weighted Grades Work
Not all points are equal. A weighted grade multiplies each category score by its weight, then divides by the total weight:
Example: Homework 92 (20%), Quizzes 85 (30%), Final — not yet taken (50%). So far: (92×0.20 + 85×0.30) = 18.4 + 25.5 = 43.9 points banked out of 50 possible. The final, worth half the grade, will decide everything — which is exactly why the "what do I need" calculation matters.
Weights must add to 100%. If yours don't, the calculator warns you — a 110% total silently inflates every answer, and it's one of the most common gradebook setup errors.
"What Do I Need?" — Worked Example
Current 88%, final worth 25%, target 90%
Step 1: Points already locked in: 88 × (1 − 0.25) = 88 × 0.75 = 66.
Step 2: Points still needed: 90 − 66 = 24.
Step 3: The final is worth 25% of the grade, so: 24 ÷ 0.25 = 96%.
Verdict: possible, but it needs a genuinely strong final — this is the "stretch" zone where every study hour counts.
The general formula: needed = (target − current × (1 − w)) ÷ w, where w is the final's weight as a decimal. Notice how sensitive it is to w: if the final were worth 40% instead of 25%, you'd need only (90 − 88×0.60) ÷ 0.40 = 93%. Heavier finals are more forgiving of a gap — and more punishing if you bomb them.
Raising Your Grade Before Finals
- Attack the heaviest weight first. An hour spent on a 40%-weighted final beats an hour on 10% homework, every time.
- Know your "impossible" line. If the calculator says even 100% won't reach your target, stop chasing that target and lock in the best achievable grade instead — the max-possible number is shown right under your verdict.
- Ask about the syllabus details. Dropped lowest quiz? Curved final? Extra credit? These change the math completely and they're the highest-ROI questions you can ask.
- Bank partial credit. On a final you can't ace, the difference between 70% and 85% might be your whole letter grade — attempt every question.
Study Tips That Work
Since you're here doing grade math, here's what the research actually supports: spaced practice (short sessions over days, not one marathon) beats cramming for retention; active recall (closing the book and writing what you remember) beats re-reading by a wide margin; and past exams under timed conditions are the single best predictor of final performance. Start with the topics carrying the most weight on the final — usually the ones from the second half of the course — and use the calculator above to set a concrete target score. A specific number ("I need 93%") focuses studying far better than a vague "do well."
My saved numbers reuse them in any calculator
Save a number once — like your rent or hourly rate — then just type its name instead of the number, in any calculator here. You can also type formulas like 5000 * 1.1 right into any box.
Saved only in this browser — nothing is sent to us.
Frequently Asked Questions
How do I calculate my current grade?
Multiply each category score by its weight, add them up, and divide by the total weight. With Homework 90 (20%), Quizzes 80 (30%), Final 85 (50%): (90×0.20 + 80×0.30 + 85×0.50) = 84.5. The Weighted mode above does this instantly.
What grade do I need on the final to pass?
It depends on your current grade, the final's weight, and your target. Formula: needed = (target − current × (1 − weight)) ÷ weight. Enter your numbers in "What do I need?" mode above for the exact answer.
How are weighted grades calculated?
Each category contributes its score times its weight: grade = Σ(score × weight) ÷ Σ(weights). Weights should total 100%. A 50%-weighted final counts as much as everything else combined.
What is a passing grade?
Usually 60% (D−) or 70% (C−) depending on the school — but many programs require a C or better for the course to count toward your major. Check your syllabus; the number that matters is the one in it.
How can I raise my grade quickly?
Focus on the highest-weight categories first: one strong final can outweigh weeks of homework. Ask about extra credit, redo the lowest-weight assignments you bombed, and use the calculator to find exactly which scores move the needle.