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QuickGrAde★
Free Grade Calculators · No Signup

Grade Calculator

A complete set of free online grade calculators for teachers, students, parents, and tutors — weighted course grades, final exam targets, cumulative GPA, and percentage-to-letter conversion. Everything runs instantly in your browser. For the classic question-based Easy Grader, visit the home page. Each calculator below opens on its own dedicated page with a full guide, worked examples, and formula.

Easy Grader

Classic question-based grader — enter total questions and wrong answers for an instant percentage and letter grade.

Open Easy Grader →

Weighted Grade Calculator

Combine tests, homework, projects, and participation into a single course grade using category weights.

Open Weighted Grade Calculator →

Final Grade Calculator

Find the exact score you need on the final exam to hit your target course grade.

Open Final Grade Calculator →

GPA Calculator

Convert letter grades and credit hours into a 4.0-scale cumulative GPA for the semester or full transcript.

Open GPA Calculator →

Letter Grade Calculator

Convert any percentage into a letter grade on the plus/minus, 10-point, or 7-point scale, with the matching GPA value.

Open Letter Grade Calculator →

What the calculator does

The grade calculator answers three questions at once: what percentage did the student earn, what letter grade does that translate to, and how does the score compare to every other possible outcome on this assignment. Toggle Show Quick Chart to see the full percentage-to-letter-grade mapping for the test length you entered — useful for handing back papers or projecting on the board during review.

Because the math runs entirely in your browser, results are instant and nothing is uploaded, saved, or tracked. That means the calculator works even after the page has loaded once with no internet connection.

The formula

Percentage = (Total questions − Wrong answers) ÷ Total questions × 100

The letter grade is decided by mapping that percentage onto a grading scale. QuickGrade uses the standard US 10-point scale by default — A 90–100, B 80–89, C 70–79, D 60–69, F below 60 — which is the most common scale in K–12 schools. For the plus/minus scale used at most colleges, or the 7-point scale still in use in a few districts, see the grading scale chart.

Worked examples

  • Ten-question quiz, 2 wrong. (10 − 2) ÷ 10 × 100 = 80%, letter grade B.
  • Forty-question unit test, 6 wrong. 34 ÷ 40 × 100 = 85%, letter grade B (or B on the plus/minus scale as well).
  • One-hundred-question final, 8 wrong. 92 ÷ 100 × 100 = 92%, letter grade A− on the plus/minus scale, A on the 10-point scale.
  • Fifteen-item spelling list, 0 wrong. 15 ÷ 15 =100%, letter grade A+.

For assignments that mix categories — homework, tests, quizzes, projects, participation — the single-test formula isn't enough. Use the weighted grade calculator instead, and read our weighted grades guide for a full walkthrough.

Tips for accurate grading

  • Decide rounding rules before you start. Rounding 89.5% up to 90% turns a B+ into an A− — publish the rule in your syllabus.
  • For partial credit, enter fractional wrong answers (0.5, 1.5).
  • Print or screenshot the quick chart once per test length so students see every possible outcome, not just their own.

Frequently asked questions

What is a grade calculator?

A grade calculator converts raw performance — number of correct answers, category scores, or letter grades — into a single percentage and letter grade. QuickGrade provides several: a weighted grade calculator for whole courses, a final grade calculator, a GPA calculator, and a letter-grade converter.

Which grade calculator should I use?

For a single test or quiz, use the Easy Grader on the home page. For a whole semester of assignments with categories, use the weighted grade calculator. To find what you need on the final, use the final grade calculator. To convert a percentage to a letter, use the letter grade calculator.

Do I need to sign up?

No. Every calculator on QuickGrade is free, browser-based, and requires no account. Nothing is uploaded or saved.

How is the letter grade decided?

By default we use the standard US 10-point scale: A 90–100, B 80–89, C 70–79, D 60–69, F below 60. For plus/minus or 7-point mappings, see the grading scale chart.

Can I use it for college courses?

Yes. The percentage math is identical at every grade level; only the letter-grade mapping and credit weighting differ. Colleges usually use the plus/minus scale — pair this calculator with the letter grade calculator and GPA calculator for a complete picture.

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