Grade Calculator

Divide the points you earned by the total points possible, then multiply by 100. Ninety-one points out of one hundred possible is 91 ÷ 100 × 100, which equals 91%, landing in the A range under the standard U.S. scale. This calculator does that division automatically and shows both the percentage and the letter-grade band it falls into, so you can see where a single graded item stands without doing the arithmetic by hand.

Under the most common U.S. scale, 70–79% is a C, which is a passing grade, with the failing threshold usually set at 60%. That said, some schools and instructors set their own passing line higher, occasionally at 65% or even 70% itself for certain programs. A 70% is worth treating as marginal rather than comfortable unless your specific course's syllabus confirms exactly where its passing cutoff sits.

An unweighted grade is simply points earned divided by points possible for one item, which is what this calculator computes. A weighted grade combines several categories, homework, quizzes, exams, that each count for a different share of the overall course grade, by multiplying each category's percentage by its weight and summing the results. A straight average of category percentages only equals the weighted result when every category happens to carry the same weight, which is uncommon.

First find each category's percentage using a calculator like this one, points earned divided by points possible. Then multiply each category's percentage by its weight (as a decimal) and add the results together. A student with 90% homework worth 20%, 85% quizzes worth 20%, and 88% exams worth 60% would compute (90 × 0.2) + (85 × 0.2) + (88 × 0.6) = 18 + 17 + 52.8 = 87.8%, the overall weighted grade.

On the standard unweighted 4.0 scale used by most U.S. colleges, A equals 4.0, B equals 3.0, C equals 2.0, D equals 1.0, and F equals 0.0. Schools that use plus and minus grades typically add or subtract about 0.3 per step, so B+ is roughly 3.3 and B- is roughly 2.7. This calculator reports a percentage and letter band only; GPA conversion happens as a separate step and can vary by school and by whether a course carries honors or AP weighting.

The two systems use entirely different percentage bands. In the U.S., 70–79% is typically a middling C. In the UK undergraduate system, 70% and above is First-Class Honours, the top classification, because UK marking conventions rarely award scores in the 80s or 90s even for excellent work. A percentage only means what the specific grading system behind it says it means, so a score from one country's system can't be read directly against another's scale.

No. That breakdown is common and widely published, but plenty of schools set different cutoffs, an A starting at 93% rather than 90%, for example, or failing below 65% instead of 60%. Some use ten-point bands with no plus/minus, others split every letter into three-point plus/minus increments. The bands shown here reflect one common U.S. convention; your own syllabus or student handbook is the only reliable source for the cutoffs that actually apply to a specific class.

This calculator is backward-looking: it takes points already earned on a completed assignment and returns the percentage and letter grade. The final grade calculator is forward-looking: it takes your current course grade, your target grade, and the final exam's weight, then solves for the score you still need on that final. Use this one for anything already graded, and the final grade calculator specifically for planning ahead of an upcoming final.

The calculator requires points possible to be greater than zero, since dividing by zero has no valid percentage result, and it returns an error rather than a misleading number if you try. If an assignment genuinely has no point value, for example a pass/fail item, there's no percentage to calculate for it in the first place, and it shouldn't be entered into a points-based grade calculation at all.

No, it shows the five standard letter bands, A through F, without plus or minus subdivisions, since not every school uses plus/minus grading and the exact three-point boundaries vary where it is used. If your school does grade with plus/minus and your percentage falls near a boundary, for example 87% near the B+/B line, check your syllabus for the exact cutoff rather than assuming which side of it you land on.

A B+ is commonly worth 3.3 on the standard unweighted 4.0 GPA scale, sitting between a plain B (3.0) and an A- (3.7). This plus/minus system isn't universal, though — schools that use it typically apply roughly a 0.3-point step for every plus or minus, but the exact value is set by each school's own registrar rather than a single national standard. This calculator itself reports only the five plain letter bands, A through F, without a B+/B- split, since not every school grades that way. Check your syllabus or registrar's grade-point table if your class does use plus/minus grading and you need the exact figure that will show up on your transcript.

15 out of 20 is 15 divided by 20, times 100, which equals 75%. Under the standard U.S. scale shown above, 75% falls in the C range (70–79), just above where some schools draw a C/C+ boundary at 73% or 75%. This is the same division-then-multiply formula this calculator runs on any two numbers entered — 15 points out of 20 possible works exactly like 91 out of 100 or 42 out of 60, just with a smaller total. Enter 15 and 20 directly into the calculator above to confirm the result and see exactly which letter band that specific score lands in.

Subtract the number of questions you got wrong from the total number of questions to get your points earned, then run that through the same points-earned-over-points-possible formula this calculator uses. Missing 3 questions out of 20 means 17 correct, and 17 divided by 20, times 100, equals 85%, a B. This calculator asks for points earned and points possible rather than questions missed, so convert a wrong-answers count into a correct-answers count first, total questions minus wrong answers, before entering that as points earned, with the total number of questions as points possible.