Planets
Ten celestial bodies — Sun and Moon, the five visible planets, plus the three outer ones discovered by telescope. Each one is a department of your inner cabinet.
Today · Tuesday, June 9, 2026NASA JPL DE440S · Placidus · 100k cities
Charts & calculations · Natal
Free birth chart
A precise natal chart built from NASA JPL ephemeris and Placidus houses. No signup. Shareable as a clean URL.
Birth data
A birth chart maps the sky at the instant you were born — Sun, Moon, the inner and outer planets, the lunar nodes, plus the rising sign and the twelve houses. Our engine uses the NASA JPL DE440S ephemeris (the same long-arc data the agencies rely on) for arc-second accuracy and Placidus houses on the tropical zodiac, with a database of over a hundred thousand cities for time-zone resolution.
The chart you generate here is fully formed: positions in signs and houses, retrogrades, major aspects, and an interactive wheel. Save it to your private dashboard for AI-written interpretations, synastry overlays, and PDF reports.
Try a sample chart
NASA JPL DE440SSkyfieldPlacidusTropical zodiac100k cities
What's in a birth chart
Houses
Twelve life arenas, sliced from the eastern horizon and the meridian. Houses tell you where in your life a planet is making its argument.
Aspects
The geometric conversation between planets — conjunctions, squares, trines and the rest. Aspects are the wiring diagram of the chart.
Angles
The four cardinal points — Ascendant, Descendant, Midheaven, Imum Coeli. Angles are how you meet the world and how the world meets you.
Astro databank
Charts of famous people
Good to know
Frequently asked questions
How accurate is the Astrolog natal chart?
Planet positions come from the NASA JPL DE440S ephemeris via Skyfield — the same data used in space-mission planning. Houses use the Placidus system, and birthplaces resolve against a 100,000-city database. The chart is free.
Do I need to know my birth time?
For the ascendant and house cusps, yes. If you don’t know it, use the "I don’t know the time" option — we calculate a noon chart with exact planet-in-sign positions and clearly mark the houses as approximate.
Is my birth data stored?
No. The chart is computed on the fly from the URL parameters. Your data is only saved if you explicitly choose to save the chart to an account.
Which languages are supported?
English, Spanish, French, German and Polish — the full chart, interpretations and reports.
Why calculate a natal chart?
The birth chart records the planetary positions at the moment you were born. It is the foundation of every astrological reading: transits, solar returns and compatibility all start from it.