The following table shows how I converted ranges of numeric grades to letter grades last time I taught this course. The actual conversion this semester will not be exactly the same, but is likely to be similar, so you can use this table to gauge how you are doing. Please also ask me in person about your predicted letter grade any time you want.

Here's the table. In general, numeric grades on the boundary between two ranges convert to the higher letter grade, which is why I use half-open interval notation to describe the ranges.