Natal Chart
Enter your date, time and place of birth to see where the Sun, Moon and planets were at that moment: their signs, degrees and houses.
Your birth details
How the chart is calculated
First, your browser converts the local birth time to Universal Time (UTC) using the IANA time zone database, the standard record of the world’s time zones and clock changes. It shows you the UTC offset it applied. If the clocks changed on that date, so that the time occurred twice or not at all, you’ll be asked which moment you mean.
It then calculates where the Sun, the Moon, the planets from Mercury to Neptune, and Pluto appeared from Earth at that moment, in the tropical zodiac. For the place of birth, it also works out the Ascendant, the Midheaven and the twelve house cusps in the Placidus system.
To check accuracy, we compared the positions of the Sun, Moon and planets with NASA JPL Horizons, a standard astronomical reference, at 3,164 moments each between 1900 and 2100. Every position was within 20 arcseconds, about a third of an arcminute, which is the smallest step the chart displays. Positions are cut to whole arcminutes rather than rounded, so 15°07.9′ appears as 15°07′. Other programs may round, or start from slightly different data, so a position here can differ from theirs by one arcminute.
The Ascendant, the Midheaven and the house cusps are calculated directly from their mathematical definitions, using the Placidus system for the cusps, and our automated tests confirm that the results meet those definitions at latitudes from the equator to the polar circles. Beyond the polar circles, Placidus cusps can’t always be calculated; when that happens, the chart says so rather than switching to another house system.
If you don’t know your birth time
The chart is calculated for local noon and shows each planet’s sign, but not its exact degree. Houses, the Ascendant and the Midheaven depend on the exact time, so they’re left out. If a planet changed sign on your birth date, you’ll see both possible signs. This happens most often with the Moon, which changes sign every two to three days, and with the Sun between about the 19th and 23rd of each month.
Your privacy
We never send your name, birth date, birth time or coordinates anywhere, and we don’t store them. The only thing you type that we send to our server is the place search text, which we use to suggest places and don’t log or keep. The calculation code, time zone data and interpretation texts are static files. Like every page on the site, this one is counted in cookie-free page-view statistics that see only the page address, and it shows ads from Google; both are described in the Privacy Policy. There are no accounts.
Data and credits
- Place data: GeoNames, licensed under CC BY 4.0.
- Planet positions: Astronomy Engine by Don Cross (MIT License).
- Reference data for our tests: NASA JPL Horizons.
For self-reflection and personal insight. Not a prediction and not a substitute for professional medical, legal, financial or mental-health advice.