### Step 1

Find out if your high school uses a weighted or unweighted system for calculating your GPA. Unweighted systems award the same credit for regular, honors and advanced placement (AP) classes. Weighted systems give a bonus for honors and AP classes. A common weighted system gives an addition 0.5 for honors classes and 1 for AP classes, making an honors A worth 4.5 and an AP A worth 5.

### Step 2

Determine the level of each class you have taken during high school if your school uses a weighted GPA. If not, skip to Step 3.

### Step 3

Determine the value of each of your class grades based on your school's GPA system. If the system is unweighted, each A is worth 4 points, each B is worth 3 points, each C is worth 2 points, each D is worth 1 point and each F is worth 0 points.

### Step 4

Multiply the value of each grade by the number of credits the course was worth. For example, if you received a regular A for a 0.5 credit class, its value would be 2 (4 x 0.5 = 2). If you received a regular B for a 2-credit course, it would be worth 6 (3 x 2 = 6).

### Step 5

Total the value of all of the grades you have received over your years in high school.

### Step 6

Total the number of credits you have completed.

### Step 7

Divide the total value of all the grades you have received by the total number of credits you have completed. For example, if the value of your grades totaled 88.8 and the number of credits you had earned was 24, your GPA would be 3.7.