Test Score Calculator
Use our free Test score Calculator to learn and practice. Get step-by-step solutions with explanations and examples. Includes formulas and worked examples.
Reviewed by Daniel Agrici, Founder & Lead Developer
Formula
Percentage = ((Points Earned + Extra Credit) / Total Points) x 100
Where Points Earned is the number of points scored on the test, Extra Credit is any bonus points awarded, and Total Points is the maximum possible score. For weighted multi-section tests, each section percentage is multiplied by its weight and the results are summed.
Worked Examples
Example 1: Basic Test Score Calculation
Problem:A student earned 73 out of 85 points on a chemistry test, plus 4 extra credit points. What is their percentage and letter grade?
Solution:Points earned: 73 + 4 extra credit = 77\nTotal possible: 85\nPercentage: (77/85) x 100 = 90.6%\nLetter grade: A- (90-92% range)\nGPA value: 3.7\nWithout extra credit: (73/85) x 100 = 85.9% = B
Result:90.6% = A- (3.7 GPA) | Extra credit boosted from B to A-
Example 2: Multi-Section Weighted Test
Problem:A midterm has 3 sections: Multiple Choice (30 pts, 40% weight, scored 27/30), Short Answer (20 pts, 25% weight, scored 15/20), Essay (50 pts, 35% weight, scored 40/50).
Solution:MC: (27/30) x 100 = 90%, weighted: 90 x 0.40 = 36.0\nShort Answer: (15/20) x 100 = 75%, weighted: 75 x 0.25 = 18.75\nEssay: (40/50) x 100 = 80%, weighted: 80 x 0.35 = 28.0\nTotal weighted score: 36.0 + 18.75 + 28.0 = 82.75%\nLetter grade: B- (80-82% range)
Result:82.75% = B- (2.7 GPA) | Weighted across 3 sections
Frequently Asked Questions
How do I calculate my test score as a percentage?
To calculate your test score percentage, divide the points you earned by the total possible points and multiply by 100. For example, if you earned 42 out of 50 points, your percentage is (42/50) times 100 = 84%. This method works regardless of how many points the test is worth. If your test has sections with different point values, add up all earned points across sections and divide by the total points possible across all sections. Some tests include extra credit, which should be added to your earned points before dividing. The resulting percentage can then be converted to a letter grade using your institution's grading scale.
How do weighted test sections affect my overall score?
Weighted test sections mean different parts of the test contribute different proportions to the final score. For example, a test might have multiple choice worth 40% and essay questions worth 60%. To calculate a weighted score, first find your percentage in each section, then multiply each by its weight, and sum the results. If you scored 90% on multiple choice (40% weight) and 75% on essays (60% weight), your weighted score is (90 times 0.4) plus (75 times 0.6) = 36 + 45 = 81%. Test Score Calculator handles multi-section weighted calculations automatically when you switch to multi-section mode.
What is the difference between raw score and scaled score?
A raw score is simply the number of points earned on a test, while a scaled score is a transformation of the raw score onto a standardized scale. Standardized tests like the SAT, GRE, and MCAT use scaled scores to ensure comparability across different test administrations and versions. For example, the SAT scores range from 400-1600 regardless of how many questions are on the test. Scaling accounts for slight variations in difficulty between test versions so that a score earned on one administration is equivalent to the same score on another. Classroom tests typically report raw scores and percentages rather than scaled scores.
How does extra credit affect my test percentage?
Extra credit points are added to your earned points before calculating the percentage, which can push your score above 100% in theory. For example, on a 50-point test where you earned 45 points plus 3 extra credit points, your adjusted score is 48/50 = 96%. Without extra credit, it would be 90%. Most gradebooks cap the recorded score at 100%, though some allow above-100% scores to help offset lower grades elsewhere. Extra credit is most valuable when you missed regular questions because it directly compensates for lost points. Test Score Calculator includes an extra credit field so you can see the adjusted percentage instantly.
References
Reviewed by Daniel Agrici, Founder & Lead Developer · Editorial policy