Test Score Percentage Calculator
Convert any raw test score into a percentage by entering the number of correct answers and total questions. Ideal for students checking grades, teachers grading papers, or anyone verifying pass/fail thresholds.
About this calculator
A test score percentage expresses how many questions were answered correctly relative to the total, scaled to 100. The formula is Score (%) = (correctAnswers / totalQuestions) × 100. This standardizes results so scores from tests of different lengths can be compared fairly. For example, 18 correct out of 20 and 45 correct out of 50 both equal 90%, even though the raw numbers differ. The percentage is also directly comparable to typical grading scales: 90–100% is usually an A, 80–89% a B, and so on. Understanding percentage scores helps students identify mastery levels and teachers set appropriate cut-off marks.
How to use
Imagine a student answers 34 questions correctly on a 40-question exam. Enter 34 in the Correct Answers field and 40 in the Total Questions field. The calculator applies: Score = (34 / 40) × 100 = 0.85 × 100 = 85%. The student scored 85%, which typically corresponds to a B grade. You can repeat this for any test size — for example, 27 correct out of 30 gives (27 / 30) × 100 = 90%.
Frequently asked questions
How do I calculate my test score as a percentage without a calculator?
Divide your number of correct answers by the total number of questions to get a decimal, then multiply by 100 to convert it to a percentage. For example, 18 correct out of 25 gives 18 ÷ 25 = 0.72, and 0.72 × 100 = 72%. If the division feels complex, simplify by finding a common factor first. This method works for any test, quiz, or exam regardless of length.
What percentage do I need to pass a test?
The passing threshold varies by institution, country, and exam type. Most US schools require 60–70% to pass a standard course exam, while professional licensing exams (like nursing or bar exams) often require 75% or higher. Standardized tests like the SAT or ACT use scaled scoring rather than raw percentages. Always check the specific passing criteria set by your instructor or examining body before using a percentage as a pass/fail indicator.
Why is converting a test score to a percentage useful for comparing results?
Raw scores are meaningless without knowing the total number of questions, making comparison between different tests difficult. Converting to a percentage creates a common scale from 0 to 100 that everyone understands. A score of 45 sounds better than 34, but if 45 is out of 90 (50%) and 34 is out of 40 (85%), the second performance is clearly stronger. Percentage scores also align directly with letter-grade scales and GPA conversions used by most educational institutions.