Enter your starting student count, students lost, and students gained to calculate your Student Retention Rate. You'll see the retention percentage, total students kept, and a breakdown of your enrollment change — useful for schools, tutoring programs, and music instructors tracking year-to-year student loyalty.
Student Retention Rate
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Students Retained
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Ending Enrollment
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Net Enrollment Change
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Attrition Rate
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The student retention rate is the percentage of students who continue enrollment from one period to the next. It is calculated by dividing the number of students retained (starting students minus those lost) by the total starting students, then multiplying by 100.
The formula is: Retention Rate (%) = ((Starting Students − Students Lost) / Starting Students) × 100. For example, if you started with 100 students and lost 10, your retention rate is 90%. Students gained during the period do not affect this core calculation but do impact your ending enrollment.
For K–12 schools, a retention rate above 90% is generally considered strong. Higher education institutions often aim for 80–95% depending on program type. For music schools, tutoring centers, or private instructors, rates above 70–80% per year are typically considered healthy.
Retention rate measures the percentage of students who stayed, while attrition rate measures the percentage who left. The two always add up to 100%. If your retention rate is 90%, your attrition rate is 10%.
No — new students gained during the period are not included in the retention rate calculation. Retention specifically measures how well you kept your existing students. New students do affect your ending enrollment and growth metrics, which this calculator also shows.
High retention rates reduce the cost and effort of acquiring new students, improve program stability, and often indicate strong student satisfaction. For music teachers and tutoring businesses, retaining one existing student is typically far more cost-effective than recruiting a new one.
Yes — the calculator supports year, semester, quarter, and monthly periods. Simply enter the student counts relevant to whichever time frame you want to measure. The formula remains the same regardless of the period length.
Common causes include dissatisfaction with instruction quality, scheduling conflicts, affordability issues, lack of perceived progress, or competition from other programs. Tracking retention over time helps identify trends so educators can address root causes before more students leave.