Enter either your points earned out of points possible, or how many questions you missed out of the total. You'll get your percentage, the letter grade, and a grading chart showing the score for every number of questions wrong.
How test grades are calculated
A test grade is just the fraction of available points you captured, expressed as a percentage. Whether you know your points earned or only how many questions you missed, it's the same math from two directions — and the letter grade is read off a scale. This calculator also builds a grading chart for your test: the score for every possible number of questions wrong, which is exactly the cheat sheet teachers keep next to the red pen.
The formula
Grade % = (points earned ÷ points possible) × 100 = ((total − wrong) ÷ total) × 100
Points earned is your raw score, points possible the test's maximum; in the second form, total is the number of questions and wrong is how many you missed (each question weighted equally). The letter comes from the standard scale: A = 93+, A− = 90, B+ = 87, B = 83, B− = 80, C+ = 77, C = 73, C− = 70, D+ = 67, D = 63, D− = 60, F below 60.
Worked example
Points mode: you scored 52.5 out of 60 points: (52.5 ÷ 60) × 100 = 87.5% — a B+.
Wrong-answers mode: you missed 8 of 40 questions: ((40 − 8) ÷ 40) × 100 = 80% — a B−.
The per-question shortcut (and the rounding question)
Each question on an equally-weighted test is worth 100 ÷ N points: on a 25-question quiz that's 4 points per question, so every miss drops you a predictable 4% — three wrong is a 88%, B+. Handy for knowing mid-test how much slack you have left. On borderline scores, note that rounding is a policy, not math: some teachers round 89.5 up to an A−, some truncate, and some only round the final course grade. If you're sitting on an 89.5, the syllabus — not this calculator — has your answer.
Frequently asked questions
How do I calculate my test grade?
Divide your points earned by the points possible and multiply by 100: 52.5 out of 60 points is (52.5 ÷ 60) × 100 = 87.5%, a B+. If you only know how many you got wrong, subtract the wrong answers from the total first — the calculator handles both directions.
How many points is each question worth?
On an equally-weighted test, each question is worth 100 ÷ N points, where N is the number of questions. A 25-question test is 4 points per question, so each miss costs a predictable 4% — a handy shortcut for estimating your score mid-test.
What letter grade is an 85%?
On the standard scale this calculator uses, 85% is a B (83–86.99). The full scale: A = 93+, A− = 90, B+ = 87, B = 83, B− = 80, C+ = 77, C = 73, C− = 70, D+ = 67, D = 63, D− = 60, and below 60 is an F. Your school's scale may differ slightly.
Does an 89.5% round up to an A−?
That's a teacher policy, not a math fact. Some instructors round to the nearest whole percent (89.5 → 90 → A−), some truncate, and some only round the final course average. Check the syllabus before counting on the bump.
How do I figure out my grade from the number of questions I got wrong?
Use the formula ((total − wrong) ÷ total) × 100. Missing 8 of 40 questions gives ((40 − 8) ÷ 40) × 100 = 80%, a B−. The grading chart below the result shows the score for every possible number wrong on your test.