A real chart, rendered from the sky. Tap any planet or sign to learn what it means — on this chart.
The exact moment and place you were born.
About this calculator
A birth chart is a map of the sky at the exact moment and place you were born. This one draws that map live, from your date, time and birthplace — free, and without an account.
What appears on the wheel:
| On the chart | What it is |
|---|---|
| 10 bodies | Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto, each placed at its true position |
| Your rising sign | The sign coming over the horizon at your birth — the chart is built outward from it |
| 12 houses | Whole sign houses: one sign to a house, counted from your rising sign |
| Retrogrades | Open any planet and it tells you if it was retrograde — appearing to move backwards — on your birth date |
| 5 aspects | Conjunction, sextile, square, trine and opposition — drawn as lines across the wheel |
Hover or tap any planet to see where it sits and what that placement means. The lines between planets are the aspects — the conversations the planets are having with each other.
Most free chart tools treat birth time as optional. It isn't, and this is the single biggest reason two charts for the same person can disagree.
The rising sign moves about one degree every four minutes. The sky rotates a full circle in roughly twenty-four hours, so the horizon advances fifteen degrees an hour. A birth time that is two hours out will usually put your rising sign in a different sign altogether — and because the houses are counted from the rising sign, every house in the chart shifts with it.
The planets barely move in that time. The Moon is the exception: it travels about half a degree an hour, so it can change sign within a day.
If you don't know your birth time exactly. Use the closest time you have and treat the house positions as provisional — the planets and their signs will still be right. A birth certificate, hospital record or family memory is worth chasing down before you take any house-based reading seriously.
The birthplace matters for the same reason. The horizon depends on where on Earth you were standing, so the same moment produces a different rising sign in Mumbai and in London.
If you have used another calculator, some placements here may look different. That is usually not an error — it is a different zodiac.
There are two conventions. The tropical zodiac fixes the signs to the seasons. The sidereal zodiac fixes them to the constellations as they actually sit today. The two have drifted roughly twenty-four degrees apart over the centuries, which is close to a full sign — so a late-degree tropical Leo is often a sidereal Cancer.
This calculator uses sidereal positions, measured with the Lahiri method, for the planets and the rising sign alike. Most Western sites use tropical. Neither is a mistake; they are answering the question in different traditions, and Cosmiclogy uses one consistently rather than mixing them.
That is enough to orient yourself. For how to actually interpret what you are looking at — which placements to read first, and how to weigh them — the full guide goes further.
Yes. There is no sign-up and no payment. Your details are used to calculate the chart and are not saved to any account.
For the planets and their signs, no — those barely move over a few hours. For the rising sign and the houses, yes. The horizon advances about one degree every four minutes, so an hour or two of error usually moves the entire house structure.
Either the birth time is different from the one you used elsewhere, or the other site uses the tropical zodiac while this one uses sidereal. The two run roughly a sign apart.
Whole sign houses — the oldest system, and the one used throughout Cosmiclogy. Each sign is one complete house, starting from the sign on your horizon.
No. Charts are calculated for adults only, and a birth date under eighteen years old will be declined.
Aspects — the angles between two planets. Conjunction (same place), sextile (60°), square (90°), trine (120°) and opposition (180°). Each is drawn in its own colour so you can pick out the pattern at a glance.