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Percentage Grade Calculator
Convert any test score, quiz result, or assignment score into a percentage and letter grade instantly. Enter points earned and total points to get your exact percentage, letter grade, and GPA equivalent. Supports custom grading scales.
Whether you received 47 out of 60 on a quiz or 143 out of 175 on a midterm, this calculator converts raw scores to percentages and letter grades using standard US grading scales. Essential for students tracking their academic progress throughout the semester.
Formula
Percentage = (Points Earned / Total Points) × 100 | Letter Grade based on standard US grading scale
Grade Percentage Conversion Guide
Converting raw scores to percentages is fundamental to understanding academic performance. A score of 75/100 is 75%, but 75/90 is 83.3% — a significant difference. Always convert to percentage for accurate comparison across different assignments and courses.
Standard US Grading Scale
Grade
Range
GPA
Description
A+
97-100%
4.0 GPA
Exceptional
A
93-96%
4.0 GPA
Excellent
A-
90-92%
3.7 GPA
Very Strong
B+
87-89%
3.3 GPA
Above Average
B
83-86%
3.0 GPA
Good
B-
80-82%
2.7 GPA
Above Average
C+
77-79%
2.3 GPA
Average
C
73-76%
2.0 GPA
Satisfactory
C-
70-72%
1.7 GPA
Passing
D
60-69%
1.0 GPA
Barely Passing
F
0-59%
0.0 GPA
Failing
Grade Curves and Adjustments
Professors may curve grades when the class average is lower than expected. Common curves: adding a flat point value to all scores (e.g., +5 points), scaling proportionally (highest score becomes 100% and others scaled accordingly), or using a square root curve (multiply square root of your raw percentage by 10). Always ask your professor how curves work in their class.
Extra Credit and Bonus Points
Extra credit points add to your numerator without changing the denominator. If you earned 85/100 (85%) and receive 5 extra credit points: 90/100 = 90%. If extra credit is applied to a test worth 100 points and you already have 100: you get 105/100 = 105% — boosting your course average. Check your syllabus for extra credit policies.
Frequently Asked Questions
Percentage = (Points Earned / Total Points) × 100. Example: 42/50 = 84%. 176/200 = 88%. 33/40 = 82.5%. Always divide earned by total, never the reverse. Multiply by 100 to express as a percentage.
Standard US scale: A = 90-100%, B = 80-89%, C = 70-79%, D = 60-69%, F = 0-59%. Plus/minus grading: A+ = 97-100%, A = 93-96%, A- = 90-92%, B+ = 87-89%, B = 83-86%, B- = 80-82%. Some schools and instructors use different cutoffs — always check the syllabus.
70% of 50 = 0.70 × 50 = 35 points. General formula: Points Needed = (Target %) × Total Points / 100. For 80% of 50 = 40 points. For 90% of 50 = 45 points. For any grade: points = target percentage × total points ÷ 100.
In most US colleges, 60-70% is considered passing (D grade). However, many major courses require a C (70-73%) or better. Graduate programs typically require B (80%) or better. Always check your specific program requirements — some fields like nursing, education, and engineering have higher minimum grade requirements.
Germany: 1.0 (excellent) to 5.0 (fail) — opposite of US. UK: First Class (70%+), Upper Second (60-69%), Lower Second (50-59%), Third (40-49%). Canada: similar to US but thresholds vary by province. Australia: HD (High Distinction 85%+), D (75-84%), C (65-74%), P (50-64%), F (<50%). Converting international grades is important for graduate school applications.
3.0 GPA corresponds to a B average, which is approximately 83-86% under the standard US grading scale. GPA to percentage conversions: 4.0 GPA ≈ 93-100% (A), 3.5 GPA ≈ 90-92% (A-), 3.0 GPA ≈ 83-86% (B), 2.5 GPA ≈ 77-79% (C+), 2.0 GPA ≈ 73-76% (C).