GRADING CALCULATORO N L I N EA little clarity for every grade.

From points to a percentage to a letter

Short answer: divide, multiply by a hundred, then look the result up on your scale.

percentage = points earned ÷ total points × 100

43 points out of 50 is 43 ÷ 50 × 100 = 86%. On a scale where B starts at 80, that is a B. The calculator shows exactly that.

The division is the easy half. The lookup is where grades get lost.

Half marks are not a problem

Teachers award half marks, and the arithmetic does not mind.

17.5 out of 20 is 17.5 ÷ 20 × 100 = 87.5% — a B. Type 17.5 into the points-earned field and the calculator shows 87.5%.

You do not need to round your points to a whole number first, and on this test you must not. Round 17.5 up to 18 and the calculator gives 90% — an A. Round it down to 17 and it gives 85%. The honest answer is 87.5%, a B. One half mark, rounded away before the division, moved the letter. Enter the points you actually awarded and let the division do the rest.

The boundary case that costs a letter

This is the single most useful thing on this page.

44.75 out of 50 is exactly 89.5%. The letter is B, not A.

Why it feels wrong: 89.5 rounds to 90 under ordinary rounding, and 90 is an A.

Why it is right here: the calculator picks the letter from the unrounded percentage. 89.5 is below 90, so it is a B. The two-decimal display is for your eyes only; the letter never looks at it. The note under the result says so: "Letters use the unrounded percentage."

The same thing happens anywhere on the scale. 79.5% is a C, not a B. 69.9% is a D, not a C.

Does your school agree? Often not. Many do round before assigning a letter, and some round to the nearest whole percent first. That is a real difference in your grade, and it is settled by your school's policy, not by any calculator. If you are within half a point of a boundary, that policy is the only document worth reading.

Your scale is probably not our scale

The default scale here is A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, F ≥ 0. That is our default. It is not a standard, and treating it as one is how people misread their own transcript.

Two published scales, from two real institutions:

A 91% is an A under the second and an A− under the first. Same score, different letter, each correct for the courses it governs. Note too that the second one is a single programme's scale, not the whole university's: the document that governs your grade can be as narrow as your own course.

So open Customize the grading scale and type in yours. Two to twelve rows, highest threshold first, last row starting at 0. The scale you set applies to the test score, the weighted grade and the teacher table.

A pass/fail course is just two rows: Pass at 70 and Fail at 0. On a 25-point test that puts 18 points at 72.00% — Pass — and 17 points at 68.00% — Fail.

What the calculator refuses

Type 0 into total points and no result appears. Instead: "Total points: use a number from 0.000001 to 1000000."

Division by zero has no answer, so the calculator declines to invent one. Points earned is likewise capped at the total — you cannot score 55 out of 50. If your teacher gave genuine extra credit above full marks, that is a different calculation, and your syllabus defines it.

Marking a whole class?

Do not do this division per student. The Teacher table mode prints every possible score on the test, once. See how to make a printable grading table.

Next

The result is a calculation, not an official grade. Your school's rules decide your grade.

Sources and checks