Terms of use

The calculators are free to use for personal and classroom purposes.

Estimates, not official grades

Results are estimates based on the numbers and grading scale you enter. Your school may round, weight or curve grades differently. Your teacher, syllabus and gradebook are the final word on your grade.

No warranty

The site is provided as is, without warranties of any kind. We're not liable for decisions made based on its results.

Printing charts

Teachers may print the grading charts and test score charts for use in their classes.

Last updated November 2026.