What This Calculator Does
The Letter Grade to Percentage Calculator turns a raw score into the three things students and teachers care about most: a percentage, a letter grade, and a 4.0-scale GPA value. Enter how many points you earned and how many points were possible, and the tool computes your exact percentage and maps it to the standard US letter-grade scale.
How to Use It
Type your points earned (for example, the number of questions you got right or the points awarded on an assignment) and the points possible (the maximum score). Click calculate. The result hero shows your percentage rounded to two decimals plus the letter grade, with a breakdown table including the GPA equivalent.
The Formula Explained
The math is simple division: \(\text{percentage} = (\text{points earned} \div \text{points possible}) \times 100\). The percentage is then placed into grade bands. This calculator uses a common plus/minus scale: 97%+ = A+, 93–96% = A, 90–92% = A-, 87–89% = B+, 83–86% = B, 80–82% = B-, and so on down to F below 60%. Individual schools may set slightly different cutoffs, so always confirm with your syllabus.
$$\text{Percentage} = \frac{\text{Points Earned}}{\text{Points Possible}} \times 100\%$$
Worked Example
Suppose you scored 85 points on a 100-point exam.
$$\text{Percentage} = \frac{85}{100} \times 100 = \mathbf{85\%}$$On the standard scale, 85% falls in the 83–86% band, giving a letter grade of B and a GPA of 3.0.
FAQ
Does it work with any total, not just 100? Yes. If you earned 43 out of 50, the calculator returns 86% — the points possible can be any number.
Why is my letter grade different from my school's? Grading scales vary by institution and even by instructor. This tool uses a widely used US plus/minus scale; check your course policy for exact cutoffs.
What is the GPA number? It is the typical grade-point value for that letter on an unweighted 4.0 scale, useful for estimating how a single grade affects your GPA.
