Grade Calculator

A tool that turns your scores across graded categories — homework, quizzes, tests, a final exam — into one overall grade, using the weight each category carries toward your final mark. Enter each category's weight and score (as a percent, or as points earned out of points possible) and it computes the weighted average and a letter grade.

Multiply each category's score by its weight, add those together, then divide by the total weight. For example, homework worth 20% at 90%, plus a final worth 80% at 75%, gives (20 × 90 + 80 × 75) ÷ 100 = 78%. If your weights don't add to 100%, divide by whatever they actually sum to instead — the calculator does this automatically and flags it.

Switch to the "What grade do I need on my final?" tab and enter your current grade, the weight of everything completed so far, the weight of the final, and the overall grade you want. It solves (desired − current × completed weight ÷ 100) ÷ (final weight ÷ 100) for the score you need, and flags it as unreachable if that number is above 100%.

No. This calculator finds your grade in one course from its categories or points. A GPA calculator instead averages the final letter grades of several courses, weighted by each course's credit hours, on a 0–4 (or similar) point scale — a different calculation with different inputs (a list of courses and credits, not categories and weights). Use this page for a single course's grade; a GPA calculator is a separate tool for combining course grades across a semester or degree.

They're two ways to describe the same thing. If a quiz is graded out of 50 points and you scored 45, you can enter "45 earned / 50 possible" and the calculator converts it to 90% for you, or you can just type 90% directly if that's what you already know. Use whichever matches what's in your gradebook.

The calculator still works — it divides by the total weight you entered instead of assuming it should be 100%. For example, weights of 30 + 30 + 30 (summing to 90) still produce a valid weighted average; a warning explains that the result is normalized to your actual total rather than silently padding the missing 10%. This is common when a syllabus lists weights that round to slightly over or under 100%.

This calculator uses the standard US 10-point scale by default: 90% and above is an A, 80–89% a B, 70–79% a C, 60–69% a D, and below 60% an F. Many schools use a modified scale (with plus/minus grades, or different cutoffs) — check your syllabus if your institution grades differently, since the letter shown here is a common reference point, not your school's exact policy.

German schools and universities grade from 1 (best, "sehr gut") to 6 (fail, "ungenügend"), the reverse direction of a US letter grade. This calculator converts your percentage using the common linear method: 100% maps to 1, the pass boundary (50% by default, editable) maps to 4, and 0% maps to 6, moving in a straight line between those points. It's a widely used approximation (sometimes called the "Bavarian formula"), not a single legally fixed nationwide standard — some states and school types apply it slightly differently.

Yes — the math is the same regardless of the time period a grade covers. Use it for a single quarter's categories, a full semester's categories, or to combine an already-computed quarter/semester grade with a remaining final using the second tab.

Yes — weighted-category grading works the same way at any level. High school courses more often use simple percent scores per assignment; college courses more often mix points-based assignments (points earned out of points possible) with percent-based exams, which is why this calculator supports both in the same category list.

No — if your course drops the lowest quiz or assignment, exclude that item yourself before entering your categories (or set its weight to 0), since the calculator does not know which policy your course uses.

Almost always because of when the rounding happens, not an error in either tool. Round only at the very end and results usually match; round intermediate category percentages first (which many gradebook systems also do, to a specific decimal place) and small gaps of a few tenths of a percent can appear. Check your school's specific rounding policy if you need an exact match.