3BRE · Leading the Build™ · Phase 1 — Planning, Budgeting & Programming

Enrollment Calculator

Long-range enrollment scenarios, grade by grade. Set your opening year and target class sizes, enter the enrollment ladder, and the tool derives classrooms needed, capacity, and average class size — the numbers your budget and facility program are built on.

Selected project—

Step 1School & timeline

These frame the projection. Change the horizon and the grids below re-shape automatically.

School name

Opening school yearfirst year of operation

Projection years2–10 columns

Enrollment at capacity

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Opening-year enrollment

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Enrollment at capacity

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Classrooms at capacity

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Avg class size at capacity

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Read-only access. You can view and export this calculator, but changes will not be saved.

Step 2Enrollment by grade & year

Enter planned enrollment for each grade in each year, and a target class size per grade. Grades with 0 students are simply not yet served.

Step 3Classrooms needed (derived)

Classrooms per grade = enrollment ÷ target class size, rounded up. This is the classroom count your facility program must house.

How the math works. Classrooms per grade-year = ceiling(enrollment ÷ target class size); average class size = enrollment ÷ classrooms. Capacity figures read from the final projection year. A planning model, not a promise — authorizer enrollment caps and year-one realities govern. · Leading the Build™ · 3BRE LLC