Best Grade / Blogs
Make sense of every score
Straightforward grading guides. Real numbers. No guesswork.
Grading scales
Percentage to letter grade: example scale and school rules
Convert a test percentage to a letter grade using an example plus/minus scale. Compare cutoffs, check rounding, and match your teacher's grading policy.
Test scores
15 out of 20 as a percentage: score, grade, and next steps
15 out of 20 is 75%. See the calculation, a 20-question score chart, letter-grade caveats, and how this score affects a course average.
Semester planning
How to calculate semester grade with quarters and a final exam
Calculate a semester grade using your school's quarter and exam weights. Follow a 40/40/20 example and distinguish course percentages from semester GPA.
Test planning
How many questions can I miss and still pass a test?
Find the maximum wrong answers for a target percentage on an equally weighted test, with examples for 20, 25, 30, and 50 questions.
Grade basics
How to calculate grades from points and percentages
Find your test percentage, combine assignment points, and understand when category weights matter.
Coursework
How to calculate weighted grades
A worked example of category weights, normalized averages, and the difference between blank grades and zeros.
Exam planning
What grade do I need on my final exam?
Calculate a target exam score and understand results above 100%, below 0%, and invalid exam weights.