Your Birth Chart
Ten bodies, your ascendant, your midheaven and the full ring of houses — computed from the exact minute and place you arrived, and drawn as a wheel you can read. Nothing you enter leaves your device.
Your birth details stay in your browser. The chart is calculated on your device and nothing is sent to us or stored anywhere.
How this chart is calculated
Positions come from standard orbital theory, computed in your browser rather than looked up. They are precise well beyond what ordinary chart reading requires. House placements are a different matter: they depend on an accurate birth time, an accurate location, and on which house system is in use.
Houses use the Placidus system, the most common in Western astrology. Placidus is undefined above the polar circles, so charts from those latitudes fall back to equal houses and say so.
For work that needs arc-second precision — rectification, or timing to the minute — a professional ephemeris is the right tool. This chart is built for reading and reflection.
What the Wheel Is Showing You
A birth chart is a diagram of a sky: where the Sun, Moon and planets stood as seen from one point on the Earth's surface at one minute. The ring is the ecliptic, divided into twelve thirty-degree segments, and each body is placed wherever it sat along it.
This is why a chart says Venus in Libra rather than Venus is Libra. The sign is a location, in the way a car might be parked in a particular block of a street.
The houses are a second division of the same circle, anchored to your horizon rather than to the ecliptic. That is the part your birth time and birthplace are for, and the reason a four-hour error rearranges the whole chart while leaving the planets nearly where they were.
Two Motions, Two Requirements
Two independent things are recorded here, and separating them explains most of what confuses beginners.
The planets move at their own speeds and slowly — the Moon about thirteen degrees a day, Pluto a couple of centuries for the full circle. Those positions are nearly identical for everybody born on your date anywhere in the world.
The Earth's rotation sweeps your horizon through all twelve signs every twenty-four hours, roughly a sign every two hours. That is what makes two people born the same day in the same city genuinely different charts if they arrived six hours apart.
Look at the Shape First
Before reading a single interpretation, look at the drawing as a picture. Are the bodies bunched into one quarter or spread around the rim? Is half the wheel empty? Is one sign carrying four of them?
That shape takes five seconds to see, requires no knowledge, and frames everything that follows. A placement inside a dense cluster means something different from the same placement standing alone.
Three or more bodies in one sign or house is called a stellium and concentrates much of the chart's activity into one area — emphasis bought at the cost of range.
Empty Houses Are Normal
Ten bodies cannot fill twelve houses, so at least two are always empty and usually more. This alarms people reliably and should not.
An empty house does not indicate a missing area of life. It indicates that this department is not a site of particular tension in this chart, and it is still read through the sign on its cusp and the position of that sign's ruler.
In practice the empty house is often the easier version. The crowded one is where the pressure is.
What a Missing Hour Costs
Without an accurate birth time the planetary signs are still reliable, and that is a substantial reading — ten functions distributed across twelve signs is a great deal of specific material.
What goes is the ascendant, the midheaven and all twelve house positions, because every one of them is anchored to a horizon that moves through a sign every two hours. There is no partial credit; an ascendant from a guessed hour is a guess with a decimal point attached.
This chart says which parts are affected rather than filling them in quietly. If the hour later turns up, the chart gains an entire layer at once, which is worth the effort of requesting a long-form birth certificate.