Percentage to Grade Converter

A percentage becomes a letter the moment somebody writes down where the lines fall, and the lines are the whole argument. An 89 is a B+ under the table loaded here and could be a B− somewhere else; the arithmetic that got you to 89 has nothing to say about it. So the thresholds on this page are an editable list rather than a fixture: the default is a real published scale with a name attached, and the moment your syllabus disagrees you type your own over the top and the answer follows your syllabus instead of ours.

How it is calculated

percentage = score ÷ maximum × 100 · grade = the highest band whose floor it clears

The table that loads by default is the one the Johns Hopkins School of Nursing publishes to "determine conversion of percent score to letter grade": 97–100 is an A+, 93–96 an A, 90–92 an A−, and so on down to below 60, which is an F. Bands are read as a letter followed by the lowest percentage that earns it, in any order, separated by commas or new lines — anything below the last band is an F. Columbia University's School of Professional Studies publishes a different set worth pasting in for comparison: its A+ starts at 98 rather than 97, and below C− it drops straight to a single D covering 60 to 69.9, with no D+ or D− at all.

Source: Johns Hopkins School of Nursing, Grading Policy — "The grading scale below is used to determine conversion of percent score to letter grade", from 97-100 A+ 4.00 down to < 60 F 0.00

Questions people ask

Whose grading scale is loaded by default?

The Johns Hopkins School of Nursing's, because it is published in full — every band, with its grade points, in one document. It is not a national standard, because there is no national standard. If your course prints its own table, that table wins and you should type it in.

How do I enter my own thresholds?

One band per entry, letter first, then the lowest percentage that earns it: "A 90, B 80, C 70, D 60". Commas, semicolons and new lines all separate. Order does not matter — they are sorted from the top before anything is compared — and any entry the page cannot read is listed back to you rather than skipped in silence.

What happens at exactly the boundary?

The band is inclusive at its floor, so 83 with the loaded table is a B, not a B−. That matches how published tables are written: Johns Hopkins prints the B band as 83–86, with 83 inside it.

Why does it tell me how many marks I am short?

Because a percentage gap is hard to act on and a mark gap is not. Being 1.0 percentage points off a B+ on a fifty-mark paper is half a mark; on a two-hundred-mark paper it is two. The page works that out against the maximum you typed.

Does it round the percentage before comparing?

No. 42.5 out of 50 is 85 percent and 42.4 is 84.8, and both are compared as they stand. Rounding is a school policy, not arithmetic — Johns Hopkins rounds a final course grade from the tenth place to the whole number, others do not round at all — so this page leaves it to you rather than silently applying somebody's rule.

Can I use it for the Polish 1–6 scale?

Yes, by typing your own bands: "6 96, 5 86, 4 71, 3 51, 2 31" or whatever your school's statut says. It is worth stressing that those numbers have to come from your school. Polish law fixes the six grade names and leaves the percentage cut-offs to each school's own assessment rules, so there is no national table to load here and this page does not pretend otherwise.

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