Free Hayz & Halb Calculator

Hayz is the medieval term for a planet in its own domain. This calculator follows al-Qabisi I.78 as translated in Benjamin Dykes's Introductions to Traditional Astrology, pages 113 through 115. Halb is the preferred hemisphere relative to the Sun; hayz adds a sign of the planet's own gender.

Hayz builds directly on sect, the day or night character of the whole chart. The guide to sect in astrology covers that chart-level picture: which light leads, and which planets belong to the team in favor. This calculator takes the next step and asks the question planet by planet, so you can see how settled each one is inside the sect rather than only whether it is on the right side of it.

The report shows sect membership alongside the hemisphere and sign-gender tests. A planet can hold hayz in either a day or a night chart. Its preferred hemisphere changes with the chart's sect.

1. Sect. The diurnal team is the Sun, Jupiter, and Saturn; the nocturnal team is the Moon, Venus, and Mars. A diurnal planet is of the sect in a day chart, a nocturnal planet in a night chart. Mercury joins whichever team its solar phase puts it on: diurnal as a morning star, nocturnal as an evening star.
2. Halb (hemisphere). Halb means "half," the day half or night half of the chart. A diurnal planet keeps halb in the same hemisphere as the Sun: above by day, below by night. A nocturnal planet takes the opposite hemisphere: below by day, above by night. The engine supplies actual horizon position, independently of whole sign house number.
3. Gender. A masculine planet in a masculine sign (fire or air), or a feminine planet in a feminine sign (earth or water). The gender is the planet's own, which is why Mars, masculine but nocturnal, takes its match from a masculine sign while still following the nocturnal rule for sect and hemisphere.

A planet in its preferred hemisphere holds halb. Matching sign gender completes hayz. When the hemisphere condition is unmet, the summary label reports whether the planet belongs to the chart's sect.

Each planet gets one of four verdicts, strongest first: in hayz, in halb, of the sect, or contrary to sect. The sect light is worth reading first, since a Sun in hayz by day or a Moon in hayz by night is one of the clearest signs of a chart at home in its own sect. The calculator marks the sect light so you can find it at a glance.

A contrary planet is not a problem to fix, only a planet working against the grain of the time. The contrary malefic, Mars by day or Saturn by night, is the one the tradition watches most closely; the benefic and malefic calculator sorts those roles for the chart as a whole. Read each planet's hayz alongside its essential dignity, its house, and its aspects rather than as a verdict on its own.

These conditions sit close together, so here is where each one lives. Sect is the chart-level frame: day or night, sect light, and the team in favor. Hayz takes that frame down to the single planet and grades how fully it keeps to it. The two answer different sizes of the same question, which is why it helps to run sect first and hayz second.

Hayz is also distinct from a planet's joy (the house it rejoices in) and from essential dignity (rulership, exaltation, triplicity, bound, and face). A planet can be in hayz without being dignified by sign, and dignified without being in hayz. For the question of whether a planet is being actively helped or harmed by the benefics and malefics around it, that is bonification and maltreatment, and for the sect light's bodyguards, the doryphory calculator. Hayz answers only one thing, and answers it cleanly: how at home is this planet in the sect of the chart.