Converting a Percentage to a 4.0 GPA: 5 Effective Methods
Represent your percentage as x and use the following formula to convert it to a GPA on a 4.0 scale: (x/20) - 1 = GPA.
If you have a grade in Geology of 89%, for instance, apply the formula to get your GPA equivalent: 89/20 - 1 = 3.45.
Even if your percentage exceeds 100%, use the same formula to determine your GPA. For example, if you get a 108% in Algebra, then your GPA equivalent is 4.4.
Bear in mind that using a scale to calculate your GPA may be more appropriate, depending on your purpose. If you are calculating your high school GPA grade by grade, you might not need to use the formula above since your grades will usually fall into a range. For instance, a B typically falls into a range of 83-86, which could be equivalent to a 3.0 GPA depending on your school's system.
Each school has a numerical equivalent to each grade on a 4.0 scale. Each of your grades at the end of a course corresponds to a score on the scale. It is best to investigate your school's GPA system, as numerical scores may differ slightly. Here's an overview of the typical scoring system: A = 4; A- = 3.7; B = 3.3; B = 3; B- = 2.7; C = 2.3; C = 2.0; C- = 1.7; D = 1.3; D = 1; D- = .7; F = 0.
Add up each of your numerical scores to determine your total score. If you assume you earned a C in English, B in History, B in Math, C in Chemistry, A- in Physical Education, and A- in Art, your score will total 18.3.
To calculate your GPA, begin by dividing the sum of your numerical scores by the total number of classes taken. This will give you the average numerical score, which translates to your final GPA on a 4.0 scale. For example, if you took six classes and your total numerical scores add up to 18.3, your final GPA would be 3.05 or 3.1.
If you've taken honors or AP classes, you'll need to factor in weighted GPA. Under this system, grades for tougher classes are weighted above the traditional 4.0 scale, with a maximum of 5.0. To calculate weighted GPA, assign numerical scores to your letter grades as shown in the scaling system above, but add 1 point to honors and AP grades.
After doing so, add up all the numerical scores and divide the sum by the total number of classes taken. This gives you the average score, which equates to your final GPA on a 5.0 scale. For example, if you took six classes and your numerical scores add up to 20.7, your final GPA would be 3.45 or 3.5.
If you have a B.Sc. Transcript or Research M.Sc. without courses taken, use the following method. Multiply the credit hours of each course by the letter grade equivalent to get the quality points. For instance, if you took a three-credit class and received an A grade (equivalent to 4.5 numerical score), your quality points would be 13.5.
Once you have the quality points for all your classes, add them up and divide by the total course credits. This will give you your final GPA score.
To calculate your GPA, sum the credits from your last 2 years or the last 60 credit hours of study. Then divide the total quality points by the sum of the credit hours. You can do this using the following equation: (Credit Hours x Letter Grades) / Total Credit Hours, or Quality Points / Total Credit Hours. Once your calculation is complete, your GPA is determined. The GPA can be calculated by dividing your calculated GPA by 4.0, with the result being X / 4.5.
If you need to convert a 98 weighted GPA to a 4-point system, you must first determine the weight of each class type. Most schools count grades above 90 as 4.0, while some schools weigh harder classes differently or use a different scale. To determine how your school weighs GPAs, use the school's conversion methods.
To convert a score of 11.54/20 to GPA, you must first create a percentage by dividing 11.54 by 20 and then multiplying the result by 100. The percentage for this example is 57.7%. Next, divide that percentage by 20, which results in 2.885. Finally, subtract 1 to get either 1.885 (on a 5-point system) or 0.885 (on a 4-point system).
If you received a 3.6 GPA out of 4, you can convert it to a percentage by dividing the percentage by 100 and then dividing the result by the maximum possible GPA. In this case, the percentage value is 90% (3.6/4 = 0.9).
Hannah Madden, an esteemed writer, editor, and artist, currently calls Portland, Oregon, her home. She earned her B.S. in Environmental Studies from Portland State University in 2018 and is passionate about penning articles on conservation, sustainability, and eco-friendly products. When she's not busy writing, Hannah can be found engrossed in her hand embroidery projects or listening to some good music. It's worth noting that 25 other co-authors contributed to this article, which has garnered an impressive 1,951,709 views since its first publication.
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