Test grade calculator

score = (total − wrong) / total × 100

The number correct divided by the total, as a percentage. If questions are worth different points, use points instead: enter the total points possible and the points missed. Partial credit works too; the fields accept decimals, so 2.5 points missed is fine.

The letter grade comes from the common scale: A 93 and above, A− 90, B+ 87, B 83, B− 80, C+ 77, C 73, C− 70, D+ 67, D 63, D− 60, F below 60. If your school uses a different scale, read the percentage and apply your own cutoffs.

A student misses 6 of 40 questions.

1. Correct: 40 − 6 = 34.
2. Score: 34 / 40 × 100 = 85%.
3. Letter grade: B.

On a 40-question test each question is worth 2.5 percentage points, so every additional question missed costs 2.5%.

A quiz is worth 25 points and a student loses 4.

• Score: 21 / 25 × 100 = 84%, a B.

Each point is worth 4% here, so the jump between letter grades comes quickly: one more point lost gives 80% (B−), one fewer gives 88% (B+).

Below the result, the calculator lists the score and letter grade for every possible number wrong, from 0 up to the total, with the current student's row in bold. Teachers can keep it open while marking a stack of tests and read each grade straight from the chart, a quick alternative to a paper grading chart.

You can print the page from your browser if you prefer it on paper, and the link saves the test's total, so the same chart opens next time.

This calculator gives the raw score. Teachers who curve grades do it in different ways:

• Adding points: add the same number of percentage points to everyone's score, for example to bring the highest score up to 100%.
• Dropping a question: remove a flawed question from the total for everyone (enter a total one lower), or count it correct for everyone.
• Scaling: multiply all scores by the same factor.

To see how a test affects a course grade, enter its percentage in the grade calculator along with the category weights from the syllabus.

• Bonus questions: grade the regular questions here, then add the bonus percentage points on top of the score.
• Rounding: the score is shown with two decimals; many teachers round to the nearest whole percent.
• Sharing: the Share button copies a link with the test total and the number wrong.

Your school's grading policy is always the official one.

A 50-point test where a student loses 7.5 points, including half credit on two short answers:

• Score: (50 − 7.5) / 50 × 100 = 85%, a B.

Each point is worth 2% on a 50-point test, so half a point is 1%. Partial credit can move a student across a letter-grade boundary, which is why the chart lists scores for whole numbers wrong; for half points, type the exact number in the field.

Questions on the test	Each question is worth
10	10%
20	5%
25	4%
40	2.5%
50	2%
100	1%

On short quizzes a single question changes the letter grade; on long tests it takes several. That's worth keeping in mind when one quiz counts as much as a test in the gradebook.