With the illustrative inputs below, the result is 7 attendees.
Try this with your own numbersFormula and worked example
Required attendance = ceiling(class fixed cost / (fee − attendee cost))
| Input | Example |
|---|---|
| Instructor and room cost per class | 150 |
| Fee per attendee | 25 |
| Variable cost per attendee | 3 |
| Calculated result | 7 attendees |
Choose reliable inputs
Connect teaching time, preparation, attendance and room capacity to each lesson or class. For this dance school calculation, use attendance records, teaching schedules and room costs and a consistent definition of one class place.
- Teaching time: include the portion belonging to this class place or reporting period, and record where the value came from.
- Rent: include the portion belonging to this class place or reporting period, and record where the value came from.
- Enrollment handling: include the portion belonging to this class place or reporting period, and record where the value came from.
Use the same currency for every money input. Do not mix weekly costs with monthly revenue, or count the same expense in both an itemised cost and allocated overhead.
How many paid places cover a class?
Compare the result with safe room capacity. Revenue per attendee must exceed variable attendee cost.
What if this input changes?
If instructor and room cost per class rises by 10%, this example changes by 1 attendees. This shows the effect of one change; it does not predict what will happen.
Open the calculator, save your baseline, then change the input supported by the least reliable estimate in your records. Compare both scenarios before committing to a price or capacity promise.