The Chaturthamsa is the fourth divisional chart: each sign is cut into four parts of 7 degrees 30 minutes, and those parts fall in the sign itself and in its three kendras, the 4th, the 7th and the 10th from it. Brihat Parashara Hora Shastra ch. 6 assigns the D4 to property and fortune, and it is read alongside the 4th house of the birth chart.
Four quarters of 7 degrees 30 minutes fill a sign, and each quarter maps three signs further on than the last. The first stays in the occupied sign, the second goes to the 4th from it, the third to the 7th, and the fourth to the 10th. A planet at 3 degrees of Aries stays in Aries; at 10 degrees it moves to Cancer; at 20 degrees to Libra; at 28 degrees to Capricorn.
Because kendras from a sign share its modality, every D4 placement lands in a sign of the same modality as the original. A planet in a movable sign stays in a movable sign, a fixed stays fixed, a dual stays dual. That is a structural property of this division and a quick way to check the result by eye.
The classical method reads a varga together with the bhava that carries its subject, so the D4 is examined beside the 4th house of the birth chart, its lord, and Mars and Venus, which are the significators traditionally consulted for land and for vehicles and comforts respectively. The division supplies resolution; the birth chart supplies the promise.
In practice that means comparing a planet's condition in both. A 4th lord that is strong in the birth chart and also well placed in the D4 is read differently from one that is strong in the D1 alone, and this page gives you the second half of that comparison with signs, houses and dignities.
A chaturthamsa is 7 degrees 30 minutes wide, which the ascendant crosses in about thirty minutes on average. That makes the D4 one of the more forgiving divisions: it stays meaningful on a chart whose birth time is known to the quarter hour, where the D24 or the D60 would not be.
What the page does not do is turn a placement into a statement about a house you will or will not own. BPHS gives the chart its subject and AstroZivi names that subject; a reading beyond it would need a text and a verse, and the site publishes readings only where it has them. The chart, the signs, the houses and the dignities are what can be stated exactly.
Brihat Parashara Hora Shastra ch. 6 assigns the Chaturthamsa to property and fortune - land, house and fixed assets. It is read alongside the 4th house of the birth chart and its lord rather than on its own.
Divide each sign into four parts of 7 degrees 30 minutes. The first part stays in the sign, the second maps to the 4th from it, the third to the 7th and the fourth to the 10th - that is, to the sign's own kendras.
Because the kendras of a sign share its modality. A planet in a movable sign therefore lands in a movable sign in the D4, a fixed in a fixed, and a dual in a dual. It is a useful check that the division has been computed correctly.
A chaturthamsa is 7 degrees 30 minutes wide and the ascendant crosses it in about thirty minutes on average, so the D4 tolerates a birth time known to the quarter hour, unlike the finer divisions such as the D24 or the D60.
AstroZivi does not make that claim. The classical sources give the chart its subject, and a reading beyond that would need a named text and verse. The page gives you an accurate D4 with signs, houses and dignities to read beside the 4th house.
Comprehensive multi-chapter analysis: charts, all dashas, strengths, yogas, doshas, life areas, longevity & remedies.
For educational purposes. Astrological interpretations are traditional and not a substitute for professional advice.