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Test Grade Calculator

Calculate your test grade as a percentage, fraction, and letter grade. Enter total questions and wrong answers to find your score.

How to Calculate Test Grades

Enter the total number of questions on your test and how many you answered incorrectly. The calculator computes your score as a percentage, fraction, and letter grade using the standard US grading scale.

The Formula

Percentage = (Correct Answers ÷ Total Questions) × 100

Example: On a 35-question test with 4 wrong answers, you got 31 correct. Score = (31 ÷ 35) × 100 = 88.57%, which is a B+.

Standard US Grading Scale

  • A+ (97–100%): Exceptional performance
  • A (93–96%): Excellent
  • A- (90–92%): Very good
  • B+ (87–89%): Good
  • B (83–86%): Above average
  • B- (80–82%): Slightly above average
  • C+ (77–79%): Average
  • C (73–76%): Satisfactory
  • C- (70–72%): Below average
  • D+ (67–69%): Below expectations
  • D (63–66%): Poor
  • D- (60–62%): Barely passing
  • F (below 60%): Failing

Understanding Your Score

Percentage Grade

The most universal measure. Your correct answers divided by total questions, times 100. This number is the same regardless of which grading scale your school uses.

Fraction Grade

Shows exactly how many questions you answered correctly out of the total, such as 31/35.

Letter Grade

Maps your percentage to a letter using the standard scale. Note that some schools use different cutoffs (e.g., 70% for a C instead of 73%). Always check your school's policy.

Tips to Improve Test Scores

  • Spaced repetition: Review material at increasing intervals rather than cramming
  • Practice tests: Simulate exam conditions to build recall under pressure
  • Active recall: Test yourself instead of re-reading notes
  • Error analysis: Review wrong answers to understand your weak areas

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Frequently Asked Questions

How do I calculate my test grade?

Enter the total number of questions and how many you got wrong. The calculator shows your percentage, letter grade, and GPA equivalent.

What grading scale is used?

The standard US grading scale: A+ (97-100%), A (93-96%), A- (90-92%), B+ (87-89%), B (83-86%), B- (80-82%), C+ (77-79%), C (73-76%), C- (70-72%), D+ (67-69%), D (63-66%), D- (60-62%), F (below 60%).

What if my school uses a different scale?

The percentage and fraction scores are universal. Only the letter grade mapping may differ. Check your school's grading policy for the exact cutoffs.

How is the GPA calculated?

Each letter grade maps to a GPA value on a 4.0 scale. A/A+ = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, and so on down to F = 0.0.

Does this work for weighted tests?

This calculator assumes each question is worth equal points. For weighted questions, divide points earned by total points possible to get the percentage.

On a 40-question test, how many wrong answers still result in a passing score?

A typical passing threshold is 60%, which requires at least 24 correct answers (40 x 0.60). That means you can miss up to 16 questions and still pass, though the exact cutoff varies by school and course.

What is the difference between a raw score and a scaled score?

A raw score is simply the number of correct answers. A scaled score adjusts raw scores across different test versions so results are comparable even when one version is harder than another, as used on standardized exams like the SAT.

How does extra credit affect a percentage grade?

Extra credit adds points to the numerator without changing the total question count. If you scored 45 out of 50 and earned 3 extra credit points, your effective score is 48 divided by 50, which equals 96%.