Question 1

How accurate is Hora Prakash as a free online Kundli calculator?

Accepted Answer

Hora Prakash uses Swiss Ephemeris (WebAssembly), the same precision ephemeris library used by professional Vedic astrology software. Planetary positions are calculated to arc-second accuracy. Combustion uses Parashari orbs. Divisional charts D1–D60 have been verified against JHora (Jagannatha Hora) output.

Question 2

What is Vimshottari Dasha and how does Hora Prakash calculate it?

Accepted Answer

Vimshottari Dasha is a 120-year planetary period system in Vedic astrology used for timing life events. Each of the 9 planets rules a mahadasha period of fixed length. Hora Prakash calculates all three levels — mahadasha, antardasha, and pratyantardasha — with precise start and end dates based on the Moon's nakshatra position at birth.

Question 3

What is the difference between North Indian and South Indian chart styles?

Accepted Answer

Both styles show the same planetary positions but use different diagram layouts. North Indian style uses a fixed diamond grid where houses stay in position and signs rotate. South Indian style uses a fixed square grid where signs stay in position and house numbers rotate. Hora Prakash supports both styles and you can switch between them at any time.

Question 4

Does Hora Prakash work offline?

Accepted Answer

Yes. Hora Prakash is a Progressive Web App (PWA). After the first load, all calculations — including birth chart, dasha, panchang, transits, and divisional charts — run entirely offline in your browser using WebAssembly. No internet connection is required and no data is sent to any server.

Question 5

Which ayanamsa does Hora Prakash use?

Accepted Answer

Hora Prakash supports multiple ayanamsa options including Lahiri (the Indian government standard and most widely used), Krishnamurti (KP system), Raman, and others. The default is Lahiri. You can change the ayanamsa in the Settings menu — all charts and dashas recalculate automatically.