Birth Chart Calculator
Enter your birth date, birth time and birthplace to calculate your birth chart.
Your birth date, time and chart are calculated and stored only on this device; they are not sent to the server. When you search for a place, only the place name you type is sent to the server.
Sample calculation — enter your own details and calculate again
Aspects
Each cell shows the aspect symbol and its orb. A: applying, S: separating. Hover over a cell for details; on a phone you can scroll the grid sideways.
| Planet | Aspect | Planet | Orb |
|---|
Planets and points
| Point | Zodiac position | House |
|---|
Asteroids and other points
| Point | Zodiac position | House |
|---|
House cusps (Placidus)
| House | Zodiac position |
|---|
About the technique
Planetary positions are calculated with a free, open-source (MIT-licensed) astronomy library. The default house system is Placidus; you can also choose Whole Sign, Equal House or Regiomontanus. With Sidereal, the Lahiri (Chitrapaksha) ayanamsa is subtracted from every point and house cusp; with Draconic (soul chart), the tropical longitude of the true North Node is subtracted, so the North Node falls at 0° Aries. The lunar nodes are calculated as the true node.
Birthplace search covers Turkish provincial centres and large districts on this page, and about 83,000 places worldwide with a population above 2,000 (including every settlement in Turkey) from the site's own list (GeoNames). Accents don't matter (typing “pribor” finds “Příbor”), and you can type a place together with its country, such as “Paris, France”. The UTC offset at the moment of birth is found automatically from the historical records of the place's time zone (including daylight saving time and local mean time before standard zones) and shown in the result line.
The asteroids (Chiron, Ceres, Pallas, Juno, Vesta) are propagated to the moment of birth from NASA/JPL Horizons' actual positions and velocities, given every 5 years between 1800 and 2100, taking the gravity of the Sun and planets into account; the difference from JPL's direct positions is below 0.15′. Lilith is the mean apogee of the Moon's orbit, projected onto the ecliptic as in Solar Fire. The Part of Fortune is ASC + Moon − Sun for a day birth and ASC + Sun − Moon for a night birth.
This version includes the 10 classical planets (Sun–Pluto), the lunar nodes, five asteroids, Lilith and the Part of Fortune. If the birth time or place is unknown or uncertain, the ascendant and house cusps in particular are not reliable — in that case a birth time rectification is recommended.
Place data: GeoNames (CC BY 4.0). Planetary positions: Astronomy Engine (MIT).
Let's read your chart together.
The tool draws the chart; interpreting what the planets, houses and aspects say about your life is a separate craft. In a natal chart analysis we read your chart together, in detail.