What This Calculator Does
This tool computes your unweighted grade point average (GPA) straight from a list of letter grades — no credit hours required. It assumes every course carries equal weight, so it simply converts each letter into its grade point value and takes the average. This is the standard approach used by most US high schools and many colleges when credit information is not available.
How to Use It
Type your letter grades into the box, separated by commas or spaces (for example: A, B+, A-, C, B). Choose your scale: the standard 4.0 scale caps A/A+ at 4.0, while the 4.3 scale awards 4.3 for an A+. Click calculate and you'll see your GPA, the number of grades counted, and the total grade points.
The Formula Explained
Each letter maps to a point value: A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0. The GPA is the sum of those points divided by how many grades you entered:
$$\text{GPA} = \frac{\displaystyle\sum_{i=1}^{n} p_i}{n} \qquad p_i = \text{points}\!\left(\text{Letter Grades}\right)$$
Worked Example
Suppose your grades are A, B+, A-, C, and B on a 4.0 scale. The points are $$4.0 + 3.3 + 3.7 + 2.0 + 3.0 = 16.0.$$ Dividing by 5 courses gives $$16.0 / 5 = \textbf{3.20 GPA}.$$
FAQ
Does this account for credit hours? No — this is an unweighted average that treats every course equally. Use a credit-weighted GPA calculator if your courses differ in credits.
What scale should I pick? Most US institutions use the 4.0 scale. Choose 4.3 only if your school explicitly rewards A+ grades above 4.0.
What happens to unrecognized entries? Any token that isn't a valid letter grade is ignored, so stray characters won't break your result.
