4.3 - A+ 4 - A 3.7 - A- 3.3 - B+ …
The only classes you count are 10th and 11th grade academic classes.
What’s important to remember though is that this statistic is NOT used in the admissions process. It is only used for public data. JHU looks at the entire history of classes you take as in rigor and results.
Source: Old post from AddmissionsDaniel