Free birth chart

The sky at the minute you arrived

Every degree, every house cusp, every aspect, worked out from the same astronomical models professional software uses. In your browser, and no further than that.

Cast a birth chart Find my Big Three

No account. Nothing you type leaves the page.

0.07″

Median disagreement with the Swiss Ephemeris on every angle and house cusp, measured across two centuries of random dates and latitudes. The worst case, in the far north, was under six arc seconds.

Every cusp

Placidus, Koch, Campanus, Regiomontanus, Porphyry, Equal and Whole Sign, each verified cusp by cusp rather than assumed to be right.

Nothing sent

The ephemeris ships as ordinary JavaScript. Your birth data is calculated on your own device and stays there.

Two minutes, no birth time needed

Short tests, each one clear about whether it is calculating something real or simply playing a game with your answers.

Rising sign without a birth time Every ascendant your birth date allows, and the ones it rules out. Real calculation, no guessing. Astrology myths test Twelve claims you have seen stated confidently. Which ones survive checking? Which sign do you act like A game, and it says so. It will not pretend to know your star sign. Born on a cusp? The dates where your sign genuinely depends on the year and the hour, settled exactly. Does your birth time matter? Shift it by fifteen minutes, an hour and four hours, and watch exactly what moves.

Start here

These are the tools people open first.

Birth ChartThe full wheel: every degree, house cusp and aspect, with nothing paywalled.Rising SignThe exact degree climbing over the horizon at your birth, and why the minute matters.Moon SignWhere the Moon actually was, including the days it changes sign mid-afternoon.Big ThreeSun, Moon and rising in one pass, with a card you can save and post.Synastry ChartTwo charts laid over each other: every cross-aspect, both house overlays, one score.

Also free

Tarot spreads that keep their answer

Celtic Cross, past and present and future, yes or no with the reasoning shown. Every reading rebuilds from its own link, so the one you liked is still there tomorrow.

Draw a spread

Nothing you type leaves your device

There is no account, no upload and no server round trip. The ephemeris, the house formulas and the aspect search all ship as ordinary JavaScript, so the page keeps working offline once it has loaded.

The maths is checked, not asserted

Positions are compared against the Swiss Ephemeris across two centuries of random dates and latitudes before a build is allowed out. Planets agree to a fraction of an arc minute, and every house system agrees with it to a fraction of an arc second in the ordinary case. The methodology page shows the numbers.

Birth time you are not sure about

Every calculator accepts an unknown birth time. It then hides the ascendant and the houses instead of quietly inventing them, and tells you how far the Moon could drift across the day.