Calculate average monthly student attendance, attendance rate, or school days in a month from any 2 known values with step-by-step calculations.
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Average Monthly Attendance of Students Formula
The calculator uses the relationship between attendance rate, the number of school days in the month, and average monthly attendance.
- AMA = Average Monthly Attendance, measured in days attended per month
- AR = Attendance Rate, written as a percentage
- D = Number of school days in the month
If you enter the attendance rate and number of school days, the calculator finds the average monthly attendance. If you enter average monthly attendance and number of school days, it finds the attendance rate. If you enter average monthly attendance and attendance rate, it finds the number of school days represented by those values.
Attendance Rate Benchmarks
Use this table to interpret a monthly attendance rate. Schools may use different reporting rules, but these ranges are common for quick review.
| Attendance Rate | General Meaning |
|---|---|
| 95% to 100% | Strong attendance for the month |
| 90% to 94.99% | Acceptable, but missed days may be noticeable |
| 80% to 89.99% | Attendance concern for the month |
| Below 80% | High absence level for the month |
Common Monthly Attendance Values
This table shows average attendance days for common school-month lengths and attendance rates.
| School Days in Month | 90% Attendance | 95% Attendance | 98% Attendance |
|---|---|---|---|
| 18 days | 16.20 days | 17.10 days | 17.64 days |
| 20 days | 18.00 days | 19.00 days | 19.60 days |
| 22 days | 19.80 days | 20.90 days | 21.56 days |
Example
Example 1: Find average monthly attendance
A student has a 95% attendance rate in a month with 20 school days.
The average monthly attendance is 19 days.
Example 2: Find attendance rate
A student attended 18 days in a month with 20 school days.
The attendance rate is 90%.
FAQ
What does average monthly attendance mean?
Average monthly attendance means the average number of school days attended during a month. For one student, it is the number of days that student attended. For a group, it may represent the average attendance per student for that month.
Can average monthly attendance be a decimal?
Yes. The result can be a decimal when it is calculated from a percentage. For example, 95% attendance over 18 school days equals 17.10 days. In reports, this may be rounded depending on the school’s rules.
Why does the number of school days matter?
The number of school days sets the maximum possible attendance for the month. Missing 2 days in a 20-day month gives a different attendance rate than missing 2 days in an 18-day month.
