Enter your birth details for a transparent first-pass estimate of Day Master strength, your primary favorable element, and the elements that support balance.
Useful God analysis can vary by method. This calculator shows a basic support-and- drain result and names what it does not calculate, so the output can be checked instead of treated as hidden authority.
The Day Stem is the reference point. The model then groups the chart elements by whether they support the Day Master or draw energy away from it.
Find your Day Master →Visible elements count once, hidden stems count half, and the Month Branch adjusts whether support is in season. This produces a weak, balanced, or strong estimate.
See your element balance →Weak charts receive support; strong charts receive outlets; balanced charts receive measured movement. Climate and special-structure analysis remain outside this tool.
Read the calculation method →Useful God is a common translation of 用神 (Yong Shen), a technical BaZi term for the element or relationship judged most useful to the chart. It does not refer to a deity.
No single automated method settles every chart. This calculator gives a transparent first-pass Fu Yi estimate from support, drain, hidden stems, and month-branch support. Climate adjustment, transformations, special structures, and school-specific rules can change a practitioner’s conclusion.
It describes how much structural support the Day Master receives compared with how much energy it produces, controls, or withstands. Strong and weak are not personality scores and do not mean good or bad luck.
The basic method favors support for a weak Day Master and favors expression, wealth, or challenge for a strong Day Master. A balanced chart receives a smaller movement-oriented set. The result is an interpretive starting point, not a prescription.
Birth time completes the Hour Pillar and can change the element counts and strength estimate. Birthplace also matters when true solar time moves a birth across a two-hour boundary.
You see your Four Pillars, Day Master, structural strength estimate, primary favorable element, and secondary favorable elements with no account or email required. The complete chart interpretation is an optional one-time $4.99 unlock.