What grade is 27 out of 40?

67.5%, which reads as a D+ under this page's scale (D+ runs 67–69.99). The percent is exact either way; the letter depends on your instructor's boundaries.

Not here — A− starts at exactly 90, so 89.99 is a B+ under the x7/x3 convention. Many instructors round at boundaries, though, which is a policy question the syllabus answers, not the arithmetic.

What happens with extra credit above 100%?

The calculator reports it as-is: 105 of 100 points is 105% and shows as an A+. Whether scores above 100% carry into the course grade is up to the instructor's policy.

Final Grade Calculator

Final Grade Calculator — Test Grade Calculator

A points-to-letter converter for a single test: enter the points earned and the points possible and it returns the percentage and the letter under the common U.S. scale — 43 out of 50 is 86%, a B. The plus/minus boundaries follow the widespread x7/x3 convention (B+ runs 87–89.99, A− runs 90–92.99), disclosed on the page because instructors draw these lines differently. Handy for grading stacks of quizzes as much as for checking your own returned exam.

Final grade

CalculatePoints earnedPoints possible

Test grade

B · 86%

43 of 50points under the common A ≥ 90 / B ≥ 80 / C ≥ 70 / D ≥ 60 scale with +/− splits at x7 and x3. Your instructor's scale may differ.

The needed score is (target − current × (1 − weight)) ÷ weight — plain weighted-average arithmetic on the numbers you enter, computed in your browser. Weights, drop-lowest rules, rounding, and letter cutoffs vary by instructor; confirm against your syllabus. Not academic advice.

Points to percent to letter, in one step

The percent is points earned ÷ points possible × 100: 43 of 50 is 86%, 52 of 60 is 86.67%, and 27 of 40 is 67.5%. The letter then reads off the scale — 86% and 86.67% are both a B (83–86.99), while 67.5% lands at D+ (67–69.99). Working in points first is why an odd-total test like 40 or 60 questions doesn't need any mental gymnastics: the divide handles it.

Extra credit pushes the percent past 100, and the calculator lets it: 105 of 100 points reads as 105%, an A+. For teachers grading a stack, the useful trick is that the percent-per-point is fixed — on a 40-point quiz every point is 2.5%, so each wrong answer steps the grade down by the same amount.

The +/− boundary convention (and why your course may differ)

This page splits each letter band at x7 and x3: B+ is 87–89.99, B is 83–86.99, B− is 80–82.99, and the same pattern repeats across A (with A+ at 97 and up), C, and D, with F below 60. So an 89.99 is a B+ — not an A− — and 90 is exactly where A− begins; 93 turns the A− into a flat A.

None of that is standardized. Plenty of instructors use straight letters with no plus or minus, some place A− at 92 or refuse to award A+ at all, and curved courses translate rank rather than percent into letters. The percent this page computes is exact; the letter is a reading under one common convention, and the syllabus always outranks it.

Questions

What grade is 27 out of 40?: 67.5%, which reads as a D+ under this page's scale (D+ runs 67–69.99). The percent is exact either way; the letter depends on your instructor's boundaries.
Is an 89.99 an A−?: Not here — A− starts at exactly 90, so 89.99 is a B+ under the x7/x3 convention. Many instructors round at boundaries, though, which is a policy question the syllabus answers, not the arithmetic.
What happens with extra credit above 100%?: The calculator reports it as-is: 105 of 100 points is 105% and shows as an A+. Whether scores above 100% carry into the course grade is up to the instructor's policy.