How 29 out of 30 works out to 96.7%
Divide the score by the total and multiply by a hundred: 29 ÷ 30 × 100 = 96.7%. Each of the 30 questions is worth 3.33%, so the grade can only land on multiples of 3.33% — there is no way to score 98.3% on a thirty-question test.
96.7% is rounded. 29 ÷ 30 does not terminate: the exact figure is 96.6667%, which we show to one decimal place like every other percentage on this site. If your school rounds to a whole number instead, this score is recorded as 97% — and where that crosses a letter boundary it is worth checking which convention the gradebook uses, because the rounding rule and not the marking decides the letter. Ours is set out on the methodology page.
One question was wrong out of 30, and that single question cost 3.33%. If any of them were marked with partial credit the real figure is a little higher — the test grade calculator takes half marks.
96.7% as a letter grade
Schools do not all cut letters at the same percentage, so 96.7% has more than one correct answer. Here is where it lands on the three scales in common US use:
| Scale | Where 96.7% lands | Grade points |
|---|---|---|
| Plus/minus, the most common US scale | A | 4.00 |
| Straight letters, 90/80/70/60 | A | 4.00 |
| Seven-point, 93/85/77/70 | A | 4.00 |
On the plus/minus scale this site uses throughout, 29 out of 30 is an A, worth 4.00 grade points on an unweighted 4.0 scale. A school that grades in straight letters would record it as an A too. A seven-point scale reads it as an A as well. The full band table for all three, and what each letter is worth on the 4.0, 4.3 and 5.0 scales, is on letter grade to GPA.
If this grade came from a weighted class the grade points move rather than the letter: 4.00 becomes 4.50 in an honors class and 5.00 in an AP or IB class, on the usual +0.5 and +1.0 bumps. The high school GPA calculator applies those automatically.
What it takes to reach an A+
The next letter up is an A+, which starts at 97%. On a thirty-question test that is 30 out of 30 — one more correct answer than you have. Going the other way, 28 out of 30 is the lowest score that still counts as an A, so you are 1 question clear of dropping to an A-.
The scores either side of 29 out of 30
One more correct answer is 30 out of 30, 100% — an A+. One fewer is 28 out of 30, 93.3% — still an A. Nothing exists in between. A thirty-question test has exactly 30 achievable grades above zero and 96.7% is one of them; a percentage that is not a multiple of 3.33% cannot come off a test this length, whatever a rounding rule does to it afterwards.
What 96.7% does to a course average
One test is rarely the whole grade. If everything else in the course is averaging 85% and this test is worth the share in the left-hand column, the course grade lands here:
| Test is worth | Course grade | Letter |
|---|---|---|
| 10% of the course | 86.2% | B |
| 20% of the course | 87.3% | B+ |
| 30% of the course | 88.5% | B+ |
| 40% of the course | 89.7% | B+ |
Because 96.7% is above that 85% baseline, this test pulls the course average up by 2.3 points at a 20% weighting. Weightings vary, and a syllabus that puts the final at 30% is a different problem from one that puts it at 10% — put your own categories into the grade calculator, or work backwards from the grade you need with the final grade calculator.
96.7% on other test lengths
96.7% is not unique to a thirty-question test. The same percentage comes out of 58 out of 60. The letter grade is identical on all of them, because the letter only ever looks at the percentage. What differs is the granularity: 29 out of 30 moves in steps of 3.33%, while 58 out of 60 moves in steps of 1.67%, so the longer test can express grades the shorter one simply cannot reach.
About thirty-question tests
A thirty-question test, a typical end-of-unit or end-of-chapter paper. Every score on one, from 1 to 30, is charted on the out of 30 page, and the easy grader turns the same table around for marking a stack of papers: count what is wrong rather than what is right.