Letter Grade Calculator
Convert a percentage or points score into a letter grade, compare plus/minus and simple 4.0 scales, and test custom cutoffs used by your class or school.
What does a letter grade calculator do?
A letter grade calculator converts a percentage, points score, or adjusted score into a letter such as A, B, C, D, or F. It can also show an estimated grade-point value when a common 4.0 scale is selected.
What is the percentage to letter grade formula?
First calculate percentage = earned points ÷ points possible × 100. Then compare that percentage against the grading scale. A common simple scale uses 90 for A, 80 for B, 70 for C, and 60 for D, but many schools use plus/minus cutoffs.
Why do letter grades differ between schools?
Letter grades are policy decisions. One teacher may round 89.5 to A-, another may require 90.0. Some courses use mastery standards, category minimums, exam minimums, or grade caps for missing work.
How should I use the custom cutoff fields?
Use the custom cutoff fields when your syllabus has a different scale. For example, a nursing course may require 78 or 80 to pass, while another class may use a curved scale where A begins below 90.
Can this estimate GPA points?
Yes, but only as a planning estimate. GPA is usually calculated from final course grades and credit hours. For a full transcript calculation, use the Semester GPA Calculator or College GPA Calculator.
What source explains GPA conversion generally?
College Board BigFuture provides a helpful overview of converting GPA to a 4.0 scale, but your school transcript policy is still the official source.
Frequently asked questions
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Yes. Enter earned points and points possible.
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Choose the plus/minus scale option.
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Yes. Select custom scale and enter the cutoffs from your syllabus.
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Only round if your teacher or LMS policy says to round.
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Often yes in standard 4.0 scales, but some schools use a different transcript rule.
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The LMS may apply category weights, missing-work rules, rounding, or custom grading scales.