Convert your scores to letter grades instantly with our free online letter grade calculators. Whether you need to translate a test percentage into an A-F letter grade, calculate your semester GPA from multiple course grades, or set up a custom grading scale for your classroom, these tools deliver accurate results in seconds. Enter your raw score, total possible points, and your institution's grading scale to receive the corresponding letter grade, grade points, and cumulative GPA impact. Each calculator supports standard 4.0 scales, plus/minus grading, weighted honors and AP courses, and percentage-based custom scales used internationally. Students, teachers, and academic administrators use these tools to eliminate manual grade conversion errors and ensure fair, consistent evaluation. From single assignment grading to full transcript GPA computation, our letter grade calculators handle every academic scoring need. No signup required—access from any device and calculate grades with confidence.

Letter Grade Calculators: Free Percentage to Grade Conversion Tools