What this site is for
Teacher Grade Calculator helps teachers with the arithmetic side of grading: turning a raw score into a percentage and a letter grade, combining categories into a report card grade, working out what a student needs on a final, and curving a test that went badly. It also explains the decisions behind those numbers, such as how to round, how to handle a flawed question, or how to convert a rubric score, so teachers can grade consistently and explain grades to students and parents.
Who runs this site
What you'll find here
- Test grader: number of questions and number wrong → percentage and letter grade, with a quick mode for a whole stack of papers.
- Weighted grade, final exam and test curve calculators.
- Printable grading charts for test lengths from 5 to 200 questions.
- 10 grading guides covering weighting, curving, rounding, rubrics, partial credit and missing work.
How grades are calculated
Every result uses the same formula: points earned ÷ points possible × 100. Letter grades come from the standard US scale (A+ 97%, A 93%, A- 90%, B+ 87%, B 83%, B- 80%, C+ 77%, C 73%, C- 70%, D 60%, F below 60%) unless you choose a 10-point or 7-point scale or change the passing percentage in the grader settings.
The grading charts, the test grader and the other calculators share one grading engine, so a chart and a calculator can never disagree. Percentages are kept at full precision and letter grades are decided from the exact value rounded to two decimal places.
How we check our work
The worked examples in our guides are checked against the same grading engine that powers the calculators. Guides explain common practice and present the main points of view on debated questions, such as minimum grading. They don't replace your school's or district's grading policy, and we say so on every guide.
If you find a mistake, a calculation that doesn't match your gradebook, or something that's out of date, please email toolifywiz@gmail.com. Corrections are made as soon as they're confirmed, and the guide's "updated" date changes when its content does.
Privacy first
All calculations run in your browser. Student names and scores are never sent to a server. The site shows ads through Google AdSense to cover hosting costs; see the privacy policy for how that works.
Contact
Want a new tool, a different grading scale, or a guide on a topic we haven't covered? Email toolifywiz@gmail.com or visit the contact page.