CalcKitSemester Grade Calculator
Your courses this semester
Enter each course grade as a percentage (like 92) or a letter (like B+). Credits are optional — leave them blank and each course counts equally.
Example: English 92, Math 85, Science 78, History 90, Art 88 — 433 ÷ 5 = 86.6%, a B average.
Behind the numbers
How your semester average is calculated
Add up every course grade, weighting each one by its credits, then divide by the total credits. A course with no credits entered counts as 1 credit, and a course with no grade is skipped entirely. The result is your semester average as a percentage, plus the letter grade for that percentage.
For the example: (92 + 85 + 78 + 90 + 88) ÷ 5 = 433 ÷ 5 = 86.6%, which is a B on the standard scale.
The letter grade scale
Letter-grade cutoffs vary by school — some schools use 93% for an A. Letter grades typed into the calculator convert to midpoints: A 95, A- 92, B+ 88, B 85, B- 82, C+ 78, C 75, C- 72, D 65, F 55.
A few comparisons
Example semester averages
| Course grades | Average | Letter | GPA equivalent |
|---|---|---|---|
| 92, 85, 78, 90, 88 | 86.6% | B | 3.0 |
| 95, 88, 91, 84, 90 | 89.6% | B+ | 3.3 |
| 78, 82, 75, 80, 77 | 78.4% | C+ | 2.3 |
| 100, 98, 95, 99, 97 | 97.8% | A | 4.0 |
| 92 (3 cr), 85 (3 cr), 78 (1 cr) | 87.0% | B+ | 3.3 |
Raise your semester average.
Focus on high-credit courses first — a better grade in a 3-credit class moves your average more than the same improvement in a 1-credit class.
A grade near a letter boundary is worth the most effort: moving from 89% to 90% changes your letter grade, while moving from 84% to 85% does not.
Ask each teacher what is still graded before the term ends — a missing assignment can pull your average down more than a low test score.
Use percentages, not letters, when you know them. A letter grade covers a range of percentages, so the exact average needs the exact numbers.
Good to know
Your semester grade questions, answered.
How is the semester average calculated?
Each course grade is multiplied by its credits, the results are added up, and the total is divided by the total credits. A course with no credits entered counts as 1 credit, and a course with no grade is skipped.
Can I enter letter grades instead of percentages?
Yes. Type a letter such as A, B+ or C- and it is converted to a percentage midpoint: A is 95, A- is 92, B+ is 88, B is 85, B- is 82, C+ is 78, C is 75, C- is 72, D is 65 and F is 55. For the most exact average, enter percentages.
How is this different from a GPA calculator?
This calculator gives your semester average as a percentage and a letter grade across all your courses. A GPA calculator converts each grade to 4.0-scale points instead. The GPA equivalent is shown here only as a secondary line.
What if a course is pass/fail or has no grade yet?
Leave its grade blank and the calculator skips that course entirely, so it does not pull your semester average up or down.