THE NUMBERS, EXPLAINED
How to use this calculator.
Each participant is attributed to one channel. Costs are descriptive; positive enrollment and inquiry counts are required for defined rates.
Start with your inputs
Enter recruitment spend by channel (currency), inquiries by channel (counts), eligible inquiries by channel (counts), enrolled participants by channel (counts). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Recruitment spend by channel (currency) | 100,200 |
| Inquiries by channel (counts) | 20,40 |
| Eligible inquiries by channel (counts) | 10,20 |
| Enrolled participants by channel (counts) | 5,10 |
A worked example
With the example inputs above, cost per enrollment by channel (currency) is 20, 20. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Cost per enrollment by channel (currency) | 20, 20 |
| Inquiry-to-eligible conversion (%) | 50, 50 |
| Eligible-to-enrolled conversion (%) | 50, 50 |
How this is calculated
Cost per enrollment by channel (currency)
Divide each channel spend by enrollments.
Inquiry-to-eligible conversion (%)
Divide eligible inquiries by all inquiries.
Eligible-to-enrolled conversion (%)
Divide enrollments by eligible inquiries.
Symbols and units
- a
- Recruitment spend by channel (currency)
- b
- Inquiries by channel (counts)
- c
- Eligible inquiries by channel (counts)
- d
- Enrolled participants by channel (counts)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Each participant is attributed to one channel. Costs are descriptive; positive enrollment and inquiry counts are required for defined rates.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Cost per enrollment by channel (currency); Inquiry-to-eligible conversion (%); Eligible-to-enrolled conversion (%). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Each participant is attributed to one channel. Costs are descriptive; positive enrollment and inquiry counts are required for defined rates.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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