How to use it
Enter how many school days you attended and the total number of days in the school year (often 180 in the U.S.). The calculator returns your attendance percentage and checks it against a typical 90% expectation.
Formula
Attendance % = (days attended ÷ total school days) × 100Examples
Example: 162 of 180 school days attended. Attendance = 162 ÷ 180 × 100 = 90% — meets the typical expectation.
Example: 150 of 180 days. Attendance = 83.3% — below 90%, which may trigger a school intervention.
Frequently asked questions
How many school days are in a year?
Most U.S. states require around 180 instructional days per year.
What's a good high school attendance rate?
Aim for 95% or higher; many schools flag attendance below 90%.
How is high school attendance calculated?
Divide days attended by total school days, then multiply by 100.