Here's How GPAs Work
Every school converts letter grades into grade points using a Grade Point Conversion Chart. At most high schools, an A gets 4 grade points, so if you have straight As, your Grade Point Average would be 4.0
Your high school might use a different chart, but it's probably something similar to the one below.
| Grade Point Conversion Chart at a Typical High School |
| |
| Percent Earned: |
Letter Grade: |
Grade Points: |
93% or above 90-92% |
A A- |
4.0 3.75 |
87-89% 83-86% 80-82% |
B+ B B- |
3.25 3.0 2.75 |
77-79% 73-76% 70-72% |
C+ C C- |
2.25 2.0 1.75 |
67-69% 60-66% |
D+ D |
1.25 1.0 |
| 59% or below |
F |
0.0 |
|
To calculate GPA, the letter grades are converted into grade points. Then those grade points are multiplied by the amount of credit that each class is worth. At this high school, each semester-long class is worth 0.5 credits (so a year-long class is worth 1.0 credit). When the grade points are multiplied by the credits, the result is the number of grade points earned. Then the grade points earned are added together and divided by the number of credits that were attempted that semester. The result is called the Grade Point Average. Sound confusing? Look at the table below and we'll lead you through it.
| 1st Semester Grade Calculations for Joe Bloggs |
| |
| Class |
Percent |
Grade |
Grade Points |
Credits Attempted |
Grade Points Earned |
| 9th Grade English |
84% |
B |
3.0 |
0.5 |
3.0 x 0.5 = 1.5 |
| 9th Grade Math |
91% |
A- |
3.75 |
0.5 |
3.75 x 0.5 = 1.875 |
| 9th Grade Science |
76% |
C |
2.0 |
0.5 |
2.0 x 0.5 = 1.0 |
| 9th Grade Am.History |
93% |
A |
4.0 |
0.5 |
4.0 x 0.5 = 2.0 |
| Intro to Art |
52% |
F |
0.0 |
0.5 (unearned) |
0.0 x 0.5 = 0.0 |
| Physical Education |
88% |
B+ |
3.25 |
0.5 |
3.25 x 0.5 = 1.675 |
| Totals |
3.0 attempted (2.5 earned) |
8.0 |
| GPA |
8.0/3.0 = 2.667 |
|
If you look at the calculations on Joe's record, each of his letter grades were turned into grade points according to the Grade Point Conversion Chart. The B in English became a 3.0, the A- in Math became a 3.75, etc. Then, the grade points were multiplied by the credits that were attempted (0.5 credits for each class, since each grade represents one semester or, in other words, half a credit). The multiplication of grade points times credits attempted gives the "grade points earned." Notice that for the A in History, Joe earned 2.0 grade points, but for his F in Intro to Art, Joe didn't earn any grade points.
When the school added up all of the grade points earned (8.0) and divided it by the total number of credits attempted (3.0), Joe received his grade point average: 2.667.
Since a 2.0 is a C average and a 3.0 is a B average, Joe's GPA of 2.667 is about a C+ average, which is a shame because he earned an A in History, an A- in Math, a B+ in P.E. and a B in English. His F in Intro to Art pulled his GPA way down.
That F in Intro to Art also hurt him in another big way. Joe attempted a total of 3.0 credits during the first semester, but he only earned 2.5 credits. He doesn't get credit for the class that he failed.
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