A calculator is a calendar printer
The free tool on this site takes a birth date, and a time and place when they are known, and prints Heavenly Stems, Earthly Branches, and Five Element counts. It uses the same deterministic engine that signed-in charts use for structure. It does not write a personality essay, pick a lucky color, or promise a year. If those sentences appear later in a signed-in consultation, they are a different product sitting on top of the same table.
What each printed row is
Each pillar is a stem-branch pair. The page shows the four pairs when the hour is known, or three when it is not. Element counts tally how often Wood, Fire, Earth, Metal, and Water appear among the characters that were actually calculated. A count is a frequency on a small table. It is not a laboratory measurement of a person, and it is not a ranked forecast of success.
Inputs the tool will not hide
Results depend on calendar type (solar or lunar, leap month), local time, and the solar-term table. The public calculator is built so that the same input reproduces the same output. If you change the place or leave the hour empty, the printed table should change in the places those inputs control. A tool that always fills an hour is no longer showing a calendar fact; it is showing a default.
What you can do with the printout
You can use it to check another program, to learn the names of stems and branches, or to follow the public essays that explain solar terms and missing hours. You can also ignore the interpretive vocabulary entirely and treat the page as a conversion utility. That last use is legitimate. A calendar conversion does not become a reading because a heading uses the word Saju.
What the printout is not
It is not medical advice, legal advice, or financial advice. It is not a scientifically validated prediction. Traditional Myeongri may read the same table as a map of character or timing; those readings are cultural practice. The public calculator stops before that step so a visitor can see the structure without being sold a destiny in the same box.
Where consultation begins
Signed-in consultation starts after a chart exists. It is allowed to use retrieved source material and the person’s stated situation. It is not allowed to invent a missing hour or a missing theory and then treat the invention as an engine result. The split is the same split these essays keep: calculate what can be calculated; write interpretation only where a source exists; otherwise leave a blank.