GPA (grade point average) is a measure of academic performance across all of your classes. Some schools use an unweighted GPA, where grades in all classes count for the same number of points. However, some schools use a weighted GPA system where advanced classes, such as honors or advanced placement (AP) classes are given bonuses. To calculate the GPA, you need to know your grades and the weighting system of your school.

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Contact your school's counseling department to determine how grades are weighted. Common examples of weighting include awarding an extra 0.5 points to grades earned in honors classes and an extra full point for grades earned in AP classes, an extra full point for honors and two points for AP classes, or an extra half point or full point for both honors and AP classes.

Convert each of your grades to a numerical value based on your school's weighting system. For example, if your school adds one point to grades earned in both honors and AP classes, an honors or AP A would be worth five, an honors or AP B worth four, and so on. Regular classes remain worth 4 points for an A, 3 for a B, and so on.

Calculate the total points earned per class by multiplying the number of credit hours per class by the number of points earned for the grade. For example, if you had an A in an honors class that was worth two credits, multiply five by two to get 10. If you had a B in a regular class worth 0.5 credits, multiply three by 0.5 to get 1.5.

Add up the points earned for all of your classes.

Total the number of credits taken for all classes.

Divide the number of points earned by the number of credits taken to calculate your weighted GPA. For example, if you earned 85 points by taking 20 credits worth of classes, you would divide 85 by 20 to find your weighted GPA to be 4.25.

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