The Quiz Grade Calculator converts points earned and points possible into a percentage, then maps that percentage to a letter grade using a selected grading scale. It is useful for checking a single quiz, verifying a score entry, or estimating how many points were missed.
The page also reports the number of incorrect points and the selected scale. Letter-grade cutoffs vary by instructor and institution, so the percentage should be treated as the primary calculation and the letter as a configurable interpretation.
Use the score awarded after any corrections or partial credit.
Use the maximum points for the same quiz, including all graded questions.
Select a simple A–F scale or the displayed plus/minus scale.
Use the percentage for the exact result and the letter grade for the selected cutoff system.
Where:
Assumptions: The letter grade is assigned from the selected cutoff table. Extra credit above the maximum is not modeled.
The page also reports the number of incorrect points and the selected scale. Letter-grade cutoffs vary by instructor and institution, so the percentage should be treated as the primary calculation and the letter as a configurable interpretation.
Grade cutoffs vary by course and institution.
Given:
Calculation:
Percentage = 37.5 ÷ 45 × 100 = 83.333...%. Points missed = 45 − 37.5 = 7.5. On the selected scale, 83.33% maps to B.
Result: 83.33% (B)
Interpretation: The student earned just over five-sixths of the available points and missed 7.5 points.
No. This page calculates one quiz from earned and possible points. Use a weighted or course grade calculator for multiple categories.
The percentage remains valid, but the displayed letter may not match your policy. Apply your official syllabus cutoffs to the calculated percentage.
Enter decimal points exactly as awarded, such as 18.5 out of 20.
The model assumes no extra credit beyond total possible points. Add bonus points to both values only if that matches the instructor’s grading method.
The calculator assigns the letter from the unrounded percentage. The displayed percentage is rounded for readability.