What This Calculator Does
This Percentage to Letter Grade Calculator converts a numeric percentage score into a standard US letter grade (A, B, C, D, or F) and its equivalent grade point on a 4.0 GPA scale. It uses the common 10-point grading scale used by most American schools and universities. Note that individual institutions sometimes use plus/minus grades or different cutoffs, so always check your school's official policy.
How to Use It
Enter your percentage score between 0 and 100, then submit. The tool instantly returns your letter grade and its GPA equivalent. For example, an 85% earns a B, which equals 3.0 grade points on a 4.0 scale.
The Formula Explained
The calculator checks which 10-point band your score falls into. Scores of 90 and above earn an A, 80–89 a B, 70–79 a C, 60–69 a D, and anything below 60 is an F. Each letter is then mapped to grade points: A=4.0, B=3.0, C=2.0, D=1.0, F=0.0.
$$\text{Letter} = \begin{cases} A & \text{Percentage} \ge 90 \\ B & 80 \le \text{Percentage} < 90 \\ C & 70 \le \text{Percentage} < 80 \\ D & 60 \le \text{Percentage} < 70 \\ F & \text{Percentage} < 60 \end{cases}$$
Worked Example
Suppose you scored 92% on a course. Since \(92 \ge 90\), your letter grade is an A, which corresponds to a GPA value of 4.0. A score of 74% falls in the 70–79 band, giving a C and a 2.0 GPA.
FAQ
Is this the same everywhere? No. The 10-point scale is the most common in the US, but some schools use a 7-point scale or plus/minus grades. Use this as a general guide.
What is a passing grade? On this scale, a D (60% or higher) is typically the minimum passing grade, though many programs require a C or better.
How does GPA relate to letter grades? Each letter grade is worth a fixed number of grade points; your overall GPA is the average of these points across all courses, often weighted by credit hours.
