Attendance Impact Calculator
Can you still pass if you miss more classes? Enter your grade, the sessions you have attended, and how many more you plan to miss, and see what your syllabus's attendance policy actually costs you — as a graded component or as points off per absence.
Works offline — your inputs never leave this device. How that works
Common plus/minus convention; many schools use straight letters or different cut points.
82.3% — B-
Still above the passing mark of 60% on the US scale, with 22.3% to spare.
🔢 Show the math
- You have 30 sessions, have missed 3, and plan to miss 2 more — 5 in total.
- That is an attendance rate of 83.33%.
- Attendance is worth 10% of the grade, so you earn 8.33 of those points and lose 1.67.
- 84% − 1.67 = 82.33%.
Grading scales vary by institution — your school's own table and syllabus govern. Conversions shown here follow common published conventions.
🎓 Understand this tool
What it is
This answers the question the other grade tools ignore: what missing more classes will actually do to your grade, under the specific attendance policy your syllabus uses.
How it works
Two policy shapes cover nearly every syllabus. Where attendance is a graded component, your attendance rate earns that share of it and the rest is lost. Where the policy deducts points per absence after an allowance, only the absences beyond the allowance are charged.
Getting the most from it
- Find the attendance section of the syllabus and identify which of the two policies applies before entering anything else.
- Count sessions honestly, including the ones you have already missed — the tool needs both the past and the plan.
- Enter the absences you are actually considering, which is the number this tool exists to price.
- Leave out absences your institution excuses, such as documented illness or sanctioned travel; those should not be counted against you.
Reading your result
The headline is your projected grade after the absences, with the band it falls in and whether it clears the passing mark on your scale. The points-lost line shows the cost on its own, which is the figure to weigh against whatever you would be missing class for.
What it can't tell you
It cannot know whether your instructor enforces the written policy, whether participation is graded separately from attendance, or whether missing a session means missing graded work — which is frequently the larger cost.
Frequently asked questions
How much does missing a class actually cost?
It depends entirely on which policy your syllabus uses. Where attendance is a graded component, each absence costs its share of that component. Where the policy deducts points per absence after an allowance, the first few cost nothing and the next one costs the full penalty.
How do I calculate my attendance percentage?
Divide the sessions you attended by the total sessions in the course and multiply by 100. The calculator includes the absences you are planning as well as the ones already taken, since the point is to see the consequence before committing to it.
Which attendance policy does my course use?
Look for an attendance heading in the syllabus. A grading table listing attendance with a percentage means it is a graded component; wording like "each absence beyond three deducts two points" is the per-absence policy. If neither appears, ask before assuming there is no penalty.
Are there absences that do not count?
Usually yes — documented illness, religious observance, university-sanctioned travel, and disability accommodations are commonly excused, and many institutions require they be excluded. This calculator counts every absence you enter, so leave out the ones your institution excuses.
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