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Test Score Calculator
Use this free test score calculator to turn your raw marks into a percentage, a letter grade, and grade points. Enter correct answers and total questions — or points earned and points possible — and it gives your percentage score, your A–F grade with plus and minus, and your grade points on a 4.0 scale.
Grades use the common A–F scale with plus and minus: A 93–100, A− 90–92, B+ 87–89, B 83–86, B− 80–82, C+ 77–79, C 73–76, C− 70–72, D+ 67–69, D 63–66, D− 60–62, F below 60. Some schools use different cutoffs — check your syllabus.
Grade scale
The bar runs from 0% to 100%. The marker shows where your percentage falls, and the colour shows the grade band.
How it works
A test score calculator turns raw marks into the numbers that actually appear on a report: a percentage, a letter grade, and grade points. The percentage is the honest core of the result — the share of the available marks you earned — and the letter grade and grade points are simply that percentage translated into the two scales schools use most.
The percentage is the same in every mode. Divide what you earned by what was possible, then multiply by 100. If you answered 42 questions correctly out of 50, that is 42 ÷ 50 = 0.84, times 100 = 84%. If a test is marked in points rather than questions — say 168 points earned out of 200 possible — the same division gives 168 ÷ 200 = 0.84, again 84%. Questions and points are just two ways of counting the same thing, which is why the calculator offers both modes and they always agree when the numbers describe the same test.
Weighted percentage = (score 1 × weight 1) + (score 2 × weight 2) + (score 3 × weight 3), with weights adding to 100%
The weighted mode handles tests and courses where the parts are not worth the same. A final exam worth half the course matters more than a quiz worth a fifth, so each section's percentage is multiplied by its weight and the results are added. With section scores of 85%, 90%, and 78% weighted 50%, 30%, and 20%, the result is 85 × 0.50 + 90 × 0.30 + 78 × 0.20 = 42.5 + 27 + 15.6 = 85.1%. The weights must add to 100%; if they do not, the calculator tells you instead of giving a wrong answer. Set a section's weight to 0 to leave it out — a course with only two graded parts works fine that way.
The letter grade comes from the common A to F scale with plus and minus grades. A runs from 90 to 100, split into A− at 90–92, plain A at 93–96, and A+ at 97–100. B runs from 80 to 89, C from 70 to 79, D from 60 to 69, each split the same way, and anything below 60 is an F. This is the scale most American schools use, but it is not universal: some schools drop the plus and minus grades, some set the A cutoff at 94 or 95, and some grade on a curve.
Grade points translate the letter grade onto the 4.0 scale that grade point averages use. An A is worth 4.0, an A− 3.7, a B+ 3.3, a B 3.0, a B− 2.7, a C+ 2.3, a C 2.0, a C− 1.7, a D+ 1.3, a D 1.0, a D− 0.7, and an F 0.0. An 84% earns a B and 3.0 grade points, so if that test is one course among several, it contributes 3.0 times the course's credit hours to the GPA calculation.
Worked example
Take a test with 50 questions, where a student answered 42 correctly. Here is exactly what the calculator does.
Step 1 — Percentage. Divide correct answers by total questions and multiply by 100: 42 ÷ 50 × 100 = 84%.
Step 2 — Letter grade. 84% falls in the 83–86 band, which is a plain B.
Step 3 — Grade points. A B is worth 3.0 grade points on the 4.0 scale.
Step 4 — Check the points mode. The same test marked as 42 points earned out of 50 possible gives the same result: 42 ÷ 50 × 100 = 84%, a B, 3.0 points.
Step 5 — Try the weighted mode. With section scores of 85%, 90%, and 78% weighted 50%, 30%, and 20%: 85 × 0.50 = 42.5, 90 × 0.30 = 27, 78 × 0.20 = 15.6, and 42.5 + 27 + 15.6 = 85.1%, which is also a B, worth 3.0 grade points. Enter 42 correct out of 50 and the tool shows exactly 84%, grade B, 3.0 grade points, with the marker at 84% on the scale bar.
FAQ
How do I calculate my test score as a percentage?
Divide the number of correct answers (or points earned) by the total questions (or points possible), then multiply by 100. For example, 42 correct out of 50 is 42 ÷ 50 × 100 = 84%. This calculator does the same division and also gives you the letter grade and grade points.
What is the difference between a percentage and a letter grade?
A percentage is the exact share of marks you earned, while a letter grade groups percentages into bands — 90 to 100 is an A, 80 to 89 is a B, and so on. The percentage is more precise: two students can both earn a B while being nine points apart. Use the percentage to see how close you were to the next grade.
How does the weighted sections mode work?
Each section's percentage is multiplied by its weight, and the results are added. If a midterm worth 50% scored 85, a project worth 30% scored 90, and a quiz worth 20% scored 78, the result is 85 × 0.50 + 90 × 0.30 + 78 × 0.20 = 85.1%. The weights must add to 100%, and you can set a section's weight to 0 to leave it out.
What grade is 84%?
On the common American scale with plus and minus grades, 84% is a B, worth 3.0 grade points on a 4.0 scale. It sits in the plain B band of 83 to 86%, just below the B+ band that starts at 87%. Some schools use different cutoffs, so check your syllabus if your school grades differently.
Do grade points matter if my school does not use a GPA?
They matter less for day-to-day feedback, but they are still the standard way to compare grades across courses with different credit hours. A 3.0 from an 84% tells anyone reading your record exactly where the result sits on the 4.0 scale, which is why this calculator shows grade points alongside the percentage and letter.