What this tool does
A grading scale groups percentage ranges into letter categories. Schools may use plus/minus grades, curved scales, mastery levels, or other systems, so treat this as a customizable reference rather than an official policy.
Example
A common simple scale is 90–100 = A, 80–89 = B, 70–79 = C, 60–69 = D, below 60 = F.
How to use it well
Use realistic inputs, check any assumptions shown on the page, and compare the result with the rules used by your school, teacher, or assignment. CurioLift tools are designed to make the calculation transparent rather than hide it.
Frequently asked questions
Can I use this for official grading?
Only if it matches the policy used by your course or institution.
Why do some schools use A- or B+?
Plus/minus systems create smaller bands and may map to different GPA points.