StudyTools — Free Online Calculators & Study Tools for Students

Cutoff points: some schools start an A at 90%, others at 93%.
Plus/minus: not every school uses A- / B+ steps.
Weighted courses: AP, IB and honors classes may map to 4.5 or 5.0 instead of 4.0.

StudyTools provides free calculators and study resources for personal use. Results are estimates and are not official academic records — always confirm with your school or institution.