<p>How do you calculate college GPA?</p>
<p>A+/A 4.0
A- 3.7
B+ 3.3
B 3.0
...and so on...</p>
<p>If classes are worth different credits, aren't they weighed differently?</p>
<p>Yes, but all you do is you take the letter grade corresponding to the GPA number multiplied by how many units that grade is worth. For example, suppose your grades are 3-unit A, 4-unit A-, 4-unit B+, and 4-unit B-. Your average would be (3<em>4.0+4</em>3.7+4<em>3.3+4</em>2.7)/15 = 3.39.</p>