How this instrument works
Test Grade converts a raw score into a percentage the way virtually every gradebook does: divide the points you earned by the points the test was worth, then multiply by 100. A student who earns 42 out of 50 possible points scores (42/50) x 100 = 84.0%, regardless of how many total points the test happened to be out of.
This is a single-assessment calculation — one test, quiz or assignment converted from raw points into a percentage — not a combination of multiple weighted grades across a course. If you need to combine several graded categories into one overall course grade, this site's semester grade or final grade calculators handle that weighted combination instead.
Because percentage cutoffs for letter grades vary from school to school and even from class to class, this instrument reports the raw percentage only — 84.0% here — without assigning it a letter grade. Check your syllabus or school's grading scale to see what letter grade, if any, that percentage corresponds to.
- Enter how many points you earned on the test or assignment into Points earned.
- Enter the total points the test or assignment was worth into Points possible.
- Grade (%) updates automatically as your points earned divided by points possible, times 100.
- Partial-credit scores work fine — both fields accept decimal values in increments of 0.5.
Worked example — 42 out of 50 points
Enter 42 for Points earned and 50 for Points possible. Dividing gives 42/50 = 0.84, and multiplying by 100 converts that to a percentage. Grade (%) reads 84.0%.
That 84.0% is independent of the test's actual size — a test worth 21 out of 25 points, or 168 out of 200, produces the identical 84.0% because the ratio between points earned and points possible is what the formula tracks, not the raw point totals themselves.
Questions
How do I convert test points into a percentage grade?
Divide the points you earned by the points the test was worth, then multiply by 100. Earning 42 out of 50 points gives (42/50) x 100 = 84.0%. The same two-step calculation works for any test, quiz or assignment regardless of how many total points it was scored out of.
Does the percentage change if the test is out of a different number of points?
No, not as long as the ratio of points earned to points possible stays the same. Scoring 42/50, 21/25 or 168/200 all produce the identical 84.0%, because the formula only cares about the proportion of points you earned, not the raw point totals the test happened to use.
What letter grade does a percentage like 84% correspond to?
This calculator doesn't assign a letter grade, because percentage cutoffs vary by school and even by individual class — some schools treat 84% as a B, others as a B-minus, and grading scales can differ further for weighted or curved courses. Check your syllabus or school's published grading scale to see how your specific class maps percentages to letters.
Can I enter partial-credit or decimal point values?
Yes — both Points earned and Points possible accept decimal values, useful for tests with half-point questions or partial credit awarded on individual items. Entering 41.5 out of 50, for example, works exactly the same way as any whole-number score, giving (41.5/50) x 100 = 83.0%.
What's the difference between this and the semester grade calculator?
This instrument converts a single test or assignment's raw score into a percentage. The semester grade calculator instead combines several already-computed percentage grades from different categories — homework, exams, projects — into one overall course grade, weighting each category by how much it counts. Use this one first to get a percentage for an individual test, then feed that percentage into the semester or final grade calculators if you need a course-wide total.