iHow it is calculated
The absence rate is found by dividing the absences by the total classes and multiplying by 100:
rate = absences ÷ total × 100
With 12 absences out of 150 classes: 12 ÷ 150 × 100 = 8% absences, so 92% attendance.
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Education · Updated 2026
Absence Percentage Calculator
Find the absence and attendance rate from the number of absences and the total classes or school days.
Enter your data
classes
classes
Enter the number of absences and the total classes (or days). See the absence and attendance rate.
=Absence rate
8%
Absences12 classes
Total150 classes
Attendance rate92%
Absence rate = absences ÷ total × 100. In England, attendance below 90% counts as persistent absence and below 50% as severe absence (DfE).
Absence rate 8% · Attendance rate 92%Tools for pupils and students. Formulas used in UK schools and universities for averages and exams. Everything runs instantly in your browser, no account, no data sent.
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?Frequently asked questions
How is the absence rate calculated?
Divide the number of absences by the total classes (or days) and multiply by 100. For example, 12 absences out of 150 classes = 12 ÷ 150 × 100 = 8%.
How many absences are allowed?
It depends on the school rules. Usually a certain number of unexcused absences lowers the conduct grade, and exceeding a higher threshold can lead to expulsion.
What happens with too many absences?
Unexcused absences above certain thresholds lower the conduct grade and, in serious cases, lead to expulsion. Check your school’s internal rules.
What is the difference between excused and unexcused absences?
Excused absences (with a medical note or an approved request) are not penalized like unexcused ones, which directly affect the conduct grade.
How do I excuse absences?
Usually with a medical note within the set deadline, or with a request from the parent, approved by the form teacher, per the school rules.
What attendance rate is required?
It varies by institution and education level. A minimum attendance rate can be a condition for passing in some forms of education.
Do absences affect the scholarship?
Yes, for many scholarships a high number of unexcused absences or a low conduct grade can lead to losing it. Check the scholarship criteria.
How do I reduce the number of absences?
Plan your schedule, excuse justified absences on time and treat attendance as a priority — absences add up fast and are hard to make up.
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