What is the quickest way to turn a score into a letter grade?

Put the points you scored in Earned and the total in Possible. Twelve of 15 is 80.00%, a B- on the plus/minus scale. There is no calculate button and no page reload: the number updates on every keystroke, so correcting a typo is instant.

Can I check a whole term this way?

Switch the Mode control to Points and every assignment gets a row, with the term total and its letter at the top. Whatever you typed here stays in the first row, so nothing is lost in the switch. Weighted mode is there for a course graded by category weight.

Does it round the percentage up to the next letter?

No. Bands include their own floor and stop below the next one, so 89.99% is a B+ and only 90% is an A-. The percentage is shown to two decimals and the letter is read off the unrounded figure, because a rounding rule is something a syllabus decides and this page has not read yours.

What if my school uses whole letters with no plus or minus?

Set the Scale control to Whole letter. An A then starts at 90, a B at 80, a C at 70 and a D at 60, and the same 88.00% that is a B+ on the plus/minus scale becomes a plain B. The band table under the calculator redraws to match whichever one is selected.

Is anything saved or sent?

Nothing is sent anywhere. The score is kept in this browser's own storage so the box is still filled in if you come back, and clearing your browser data clears it. There is no sign-in and no upload at any point.

Can I enter questions wrong instead of points earned?

Choose Easy grader when you know the number wrong and the total. It subtracts to find the correct score and gives a printable score chart. Quick mode keeps the direct points-earned/points-possible workflow for one assignment.

Quick Grade Calculator

One score, two boxes, no waiting: type what you got and what it was out of and the percentage and the letter are there before you finish typing. Twelve of 15 is 80.00% and a B-. Nothing is uploaded, no account is asked for, and the letter comes off a scale you can see and switch, with the full band table printed under the tool.

Total points: 12 of 1580.00%B-1 more point would make it 13 of 15, 86.67% and a B.

Mode

Earned

Possible

Scale

80.00% (B-) from 12 of 15 points on the plus / minus scale.

Percentage: 80.00%

Letter: B-

Points earned: 12

Points possible: 15

Worked examples

Each one runs through the same code the page above does, on the plus / minus scale, so switching the scale moves them too.

Percentage12 of 15 correct
80.00% · B-
Weighted94 (25%), 88 (15%), 81 (25%), 92 (35%)
89.15% · B+
Quick grade3 wrong out of 25
88.00% · B+

The scale in use

Every band includes its own floor and runs up to the next one. On this scale, 89.99% is B+ and 90% is A-. The displayed two-decimal percentage does not determine the letter.

Letter	Percentage band
A+	97% and above
A	93% up to 97%
A-	90% up to 93%
B+	87% up to 90%
B	83% up to 87%
B-	80% up to 83%
C+	77% up to 80%
C	73% up to 77%
C-	70% up to 73%
D+	67% up to 70%
D	63% up to 67%
D-	60% up to 63%
F	0% up to 60%

How grades are calculated. Percentages use the scores and weights you enter and are displayed to two decimals. Letter grades use the computed percentage against the selected scale. Attainable final-score targets round upward to the next 0.01% and assume one remaining component scored from 0% to 100%. Curves, dropped scores and institutional rounding policies must come from your syllabus.

Common questions

What is the quickest way to turn a score into a letter grade?: Put the points you scored in Earned and the total in Possible. Twelve of 15 is 80.00%, a B- on the plus/minus scale. There is no calculate button and no page reload: the number updates on every keystroke, so correcting a typo is instant.
Can I check a whole term this way?: Switch the Mode control to Points and every assignment gets a row, with the term total and its letter at the top. Whatever you typed here stays in the first row, so nothing is lost in the switch. Weighted mode is there for a course graded by category weight.
Does it round the percentage up to the next letter?: No. Bands include their own floor and stop below the next one, so 89.99% is a B+ and only 90% is an A-. The percentage is shown to two decimals and the letter is read off the unrounded figure, because a rounding rule is something a syllabus decides and this page has not read yours.
What if my school uses whole letters with no plus or minus?: Set the Scale control to Whole letter. An A then starts at 90, a B at 80, a C at 70 and a D at 60, and the same 88.00% that is a B+ on the plus/minus scale becomes a plain B. The band table under the calculator redraws to match whichever one is selected.
Is anything saved or sent?: Nothing is sent anywhere. The score is kept in this browser's own storage so the box is still filled in if you come back, and clearing your browser data clears it. There is no sign-in and no upload at any point.
Can I enter questions wrong instead of points earned?: Choose Easy grader when you know the number wrong and the total. It subtracts to find the correct score and gives a printable score chart. Quick mode keeps the direct points-earned/points-possible workflow for one assignment.

Percentages use the scores and weights you enter and are displayed to two decimals. Letter grades use the computed percentage against the selected scale. Attainable final-score targets round upward to the next 0.01% and assume one remaining component scored from 0% to 100%. Curves, dropped scores and institutional rounding policies must come from your syllabus.