Grade Distribution Analyzer Formula
Understand the math behind the grade distribution analyzer. Each variable explained with a worked example.
Formulas Used
Class GPA
class_gpa = total_grade_points / total_studentsA Percentage
pct_a = count_a / total_students * 100B Percentage
pct_b = count_b / total_students * 100C Percentage
pct_c = count_c / total_students * 100Pass Rate (D or better)
pass_rate = (count_a + count_b + count_c + count_d) / total_students * 100Total Students
total_enrolled = total_studentsVariables
| Variable | Description | Default |
|---|---|---|
count_a | Number of A Grades | 8 |
count_b | Number of B Grades | 12 |
count_c | Number of C Grades | 7 |
count_d | Number of D Grades | 2 |
count_f | Number of F Grades | 1 |
total_students | Derived value= count_a + count_b + count_c + count_d + count_f | calculated |
total_grade_points | Derived value= count_a * 4 + count_b * 3 + count_c * 2 + count_d * 1 + count_f * 0 | calculated |
How It Works
How to Analyze Grade Distribution
Grade distribution shows how student performance is spread across letter grades.
Formula
Percentage = Count at Grade / Total Students x 100
Class GPA = (A x 4 + B x 3 + C x 2 + D x 1 + F x 0) / Total Students
A healthy distribution is roughly bell-shaped. Heavy concentrations at extremes may indicate assessment or instruction issues.
Worked Example
A class of 30: 8 A's, 12 B's, 7 C's, 2 D's, 1 F.
count_a = 8count_b = 12count_c = 7count_d = 2count_f = 1
- 01Total students: 8 + 12 + 7 + 2 + 1 = 30
- 02Grade points: 32 + 36 + 14 + 2 + 0 = 84
- 03Class GPA: 84 / 30 = 2.80
- 04A percentage: 8/30 = 26.7%, B: 40.0%, C: 23.3%
- 05Pass rate: 29/30 = 96.7%
Ready to run the numbers?
Open Grade Distribution Analyzer