Reference
What each calculation on this site is, how it is computed, and what the numbers mean. Written for people who want to check the working rather than take a result on faith.
The kundali (birth chart)
A janam kundali is a map of the sky at a birth moment. How the rashi chart is built, why birth time matters to the minute, and how sidereal positions are computed.
Navamsha — the D9 chart
The navamsha divides each sign into nine parts of 3°20'. What D9 shows about marriage, inner strength and whether a promising placement actually delivers.
Divisional charts — the shodashvarga
D1 through D60: what each varga is read for, from the hora to the shashtiamsha, and why the higher divisions demand arcsecond-accurate positions.
Vimshottari dasha
How the mahadasha sequence is calculated from the Moon's nakshatra, the nine planetary periods and their lengths, and how antardasha subdivisions are derived.
Ashtakavarga
Bhinnashtakavarga and sarvashtakavarga explained — how bindus are assigned, what the 337-point total means, and how the numbers are used for transits.
Kundali matching (Guna Milan)
The eight kootas of ashtakoot matching and their 36 points, what Bhakoot and Nadi actually test, and how Mangal dosha is assessed.
Ayanamsa — the sidereal offset
Lahiri, Raman, Krishnamurti and the rest. What the ayanamsa is, why it grows about a degree every 72 years, and how much your chart changes if you switch.
Panchanga
Tithi, vara, nakshatra, yoga and karana — what each of the five limbs measures and how they are calculated from the Sun and Moon.
Shadbala
The six sources of planetary strength — sthana, dig, kala, chesta, naisargika and drik bala — and how the rupas total is read.
Cast a chart
Every calculation described here runs on the chart page, from a birth date, time and place. Nothing is kept beyond what is noted in the footer.