What the calculator is really showing you
The math is simple on purpose. Leads are traffic times capture rate. Closings are leads times conversion. Commission is closings times your average check. The value of the tool is not the arithmetic, it is watching which lever moves the result most. For almost every agent, the biggest swing is the capture rate, not the number of open houses.
Why capture rate is the lever
You can only follow up with the visitors whose contact you actually kept. A paper sheet loses people to skipped fields, unreadable handwriting, and the visitor who signs in as a single initial. Raising the share of visitors who leave a usable name and contact is usually faster and cheaper than doubling your foot traffic. That is the whole case for a single-screen digital sign-in: a smaller ask that more visitors finish.
The number the calculator cannot fill in for you
Conversion is the honest variable. A captured lead you never contact converts at zero, no matter how good the open house was. The agents who get the yearly commission this calculator estimates are the ones who send the first follow-up the same day and keep a real nurture sequence going. The tool assumes you do the follow-up. If that is the part that slips, fix it before you chase more traffic.