Attendance Percentage Calculator
Calculate your attendance percentage (attendance rate) in seconds. See the formula, step-by-step math, and find how many days you can miss or how many days you need to attend to reach a target.
- Free, fast, private (runs in your browser)
- Made for students, teachers, and schools
- Includes target % tools (75%, 80%, 90%, custom)
Tip: Bookmark this page for quick checks during the school year.
Calculate Total Days
Determine the total working days between two dates, minus any holidays which will be used in the attendance calculator below.
Total working days calculator
Calculate attendance percentage
Enter total days and days attended. You’ll get your attendance rate, a rounded value, and the exact calculation.
Attendance calculator
Result
Show step-by-step calculation
Targets: days you can miss or need to attend
These tools help answer common questions like “How many days can I miss and still keep 75% attendance?”
How many days can I miss?
Calculates the maximum absences allowed while staying at or above a target percentage.
Days needed to reach a target
If you attend every remaining day (no more absences), this estimates how many future days you must attend to reach your target.
Note: Policies vary by school and region. This page provides calculations, not official policy guidance.
Attendance percentage formula
The attendance percentage formula is: (Days Attended ÷ Total Days) × 100
Step-by-step
- Divide days attended by total days.
- Multiply the result by 100.
- Optionally round to a whole percentage if your school uses rounding.
Common questions
- Attendance rate is the same idea as attendance percentage.
- Many schools calculate attendance for the year, and some do it per subject.
- If your school has a minimum attendance rule (e.g., 75%), use the target tools above.
Who is this for?
Quick answers for students, teachers, and school admins.
Students
Check your attendance percentage and plan how many absences you can afford while staying above a target.
Teachers
Quickly compute attendance rates for a student, a class period, or a term using the same formula.
Schools & Admin
Use the calculator to estimate attendance percentages for reporting, intervention thresholds, and policy communication.
FAQ
Short answers to common attendance percentage questions.
How do I calculate attendance percentage?
Use this formula: (Days Attended ÷ Total Days) × 100. Enter values above to calculate instantly.
What is a good attendance percentage?
Many schools aim for 90%+, but targets vary. Use the target tools to match your school’s threshold (75%, 80%, 85%, etc.).
Does attendance percentage round up?
Some schools round to a whole number; others keep decimals. This calculator shows both the exact percentage and a rounded value.
How many days can I miss and still keep 75% attendance?
Use the “How many days can I miss?” calculator. It computes the maximum additional absences you can take while staying at or above your target.
How many days do I need to attend to reach a target percentage?
Use “Days needed to reach a target.” It estimates the number of future days you must attend (with no more absences) to reach your target.
Is attendance calculated per subject or for the whole year?
It depends. Some schools calculate attendance per class/period, and others calculate it for the entire year. The formula is the same either way.
This site provides calculation tools and general information. For official rules, check your school’s attendance policy.