Exam Score Calculator

Your final has 80 questions, you got 64 right, and there were 5 bonus points available. What's your raw score? What percentage? What letter grade if the curve isn't applied? Type the inputs once, see all of it.

Handles fractional points (some questions weighted heavier than others), multiple choice penalty deductions (the SAT used to do this), and bonus points stacked on top. The output shows raw score, percentage, and a typical letter-grade band — though grading scales vary, so the band is informational, not a verdict.

If your professor uses a custom scale, the percentage is the number you actually need; map it to their cutoffs.

Underneath the calculator is a simple ratio: percentage = (raw earned points / total possible points) × 100. The complications are everything that happens around that ratio. Some questions are weighted differently than others, so a 'right answer' isn't always worth one point. Bonus points sit on top of the maximum without changing the denominator, which is why percentages can exceed 100. Negative marking subtracts for wrong answers, which can drop your score below the raw 'correct count' would suggest.

A worked example: 80-question multiple choice, you got 64 right, 10 wrong, 6 left blank, and there were 5 bonus points possible (you earned 3). With no negative marking, your raw score is 64 + 3 = 67 out of 80, which is 67/80 = 83.75%. With negative marking at 0.25 points per wrong answer (a common standardized-test convention), your score becomes 64 − (10 × 0.25) + 3 = 64.5 out of 80, which drops to 80.6%. Same correct-answer count, materially different result. The blank questions don't penalize you under either rule, which is why guessing strategy depends on the rule.

The grading scale conversion is where reasonable people disagree. The U.S. default of A=90, B=80, C=70 is conventional but not standardized. Many universities use A=93, B=83 with plus/minus modifiers (A−=90, B+=87 in some systems). UK exam boards use letter grades on different cutoffs entirely; international programs often use 1–10 scales. The calculator shows the U.S. default but treats the percentage as the actual answer — map to your specific institution's scale to convert.

A subtle case: pass/fail courses where the grade just maps to 'pass' if percentage ≥ some threshold (typically 60–70%). Even though your final letter doesn't appear on the transcript with a precise grade, the calculation lets you see how comfortably you're above (or below) the line. If the syllabus says pass at 70 and you're at 71.2 going into the final, you know exactly how much room you have for a bad day on the last exam.