Leave the grade blank for a term that is not finished. Grades can be above 100% if extra credit applies.
Semester grade calculator with custom weights
Semester grade formula
| Term | Grade | Weight | Points |
|---|---|---|---|
| Quarter 1 | 88 | 40% | 88 × 40 = 3,520 |
| Quarter 2 | 92 | 40% | 92 × 40 = 3,680 |
| Final exam | 85 | 20% | 85 × 20 = 1,700 |
| Semester grade | 100% | 8,900 ÷ 100 = 89% |
How to use the semester grade calculator
- List each grading period. Add quarters, trimesters, exams or projects that count separately, or start from a preset.
- Copy the official weights. Use the percentages from the course syllabus or school handbook.
- Check the semester result. Confirm the weights total 100%. Leave unfinished terms blank, or enter a target to see what you need on them.
Quarter and final-exam weights
Calculating before the semester ends: when only the first quarter is complete, the calculator averages over the weights entered. To project the final semester grade, add expected scores for unfinished terms and the exam, or enter a target grade. Rounding: the calculator shows two decimals and a standard plus and minus letter grade. Schools may round differently, so the gradebook is the official result.
FAQ
How do I calculate my semester grade?
Multiply each quarter, trimester or exam grade by its percentage weight, add the products and divide by the total weight.
What is the common 40/40/20 semester formula?
Quarter 1 counts 40%, Quarter 2 counts 40% and the final exam counts 20%. With 88, 92 and 85 the semester grade is (88×40 + 92×40 + 85×20) ÷ 100 = 89%.
Can I calculate a semester before every term is graded?
Yes. Leave unfinished terms blank to see your current average, or enter a target grade to see the average you need on the remaining weight.
Does this calculator round semester grades?
It shows two decimal places and a standard plus and minus letter grade. Schools may round or truncate differently, so check your gradebook for the official grade.
Can I rename the terms?
Yes. Every row has an editable name, and you can add as many grading periods as you need.
Does it save my grades?
No. The calculation runs in your browser and nothing you enter is sent or stored.
Does it use AI?
No. It is exact arithmetic, so the same inputs always give the same result.