Free astrology tools · Swiss Ephemeris · No account
The best day for anything, computed to the degree
Electional astrology is the old art of timing: choosing the right moment to begin. It once took an astrologer and an ephemeris to work out; here it is computed for you, the best days to marry, launch, move, or ask, each read from the real sky. Every chart tool lives here too, all on the Swiss Ephemeris, no account required.
Best dates by intention
The strongest days to marry, launch a business, or make your move, computed from the sky.
Pick your moment
Scan the coming weeks for the best windows to begin something.
The Moon right now
Sign, phase, void-of-course status, and her next move, live.
Your daily horoscope
Every transit touching your own chart today, on the clock, with the hours to use.
Free natal chart
A precise chart wheel with positions, aspects, and patterns.
Your big 3
Sun, Moon, and rising sign, computed precisely, with warm short reads.
Your Saturn return
The exact dates of your late-twenties reckoning, every pass.
Planetary hours
Which planet rules this hour, and the day's full sequence, live.
Synastry grid
Cross-aspects between two charts: where you meet, where you grind.
Transit timeline
The year ahead of your chart: every major transit, on one line of time.
The whole chart, read together
The Twelve Rooms writes deep natal readings the old way: every planet, house, aspect, and transit, one cohesive reading. I read every line myself.
Explore the readingsCommon questions
What is electional astrology?
Electional astrology is the practice of choosing the right moment to begin something, by reading the position of the Moon and planets at that moment. It's the same principle used to time weddings, product launches, and important conversations: some windows carry a stronger sky than others. Every tool on this site computes those windows with the Swiss Ephemeris, the same astronomical data professional astrologers use.
Are the tools on this site free?
Yes. The natal chart, Big 3, synastry grid, Saturn return calculator, transit timeline, planetary hours, and the Moon tracker are all free, with no account required. The Twelve Rooms also writes personalized natal and electional readings for a fee, for anyone who wants a fuller reading of their own chart against the sky.
How accurate are the date and chart calculations?
Every chart and date on this site is computed with the Swiss Ephemeris, the same high-precision astronomical library used across professional astrology software. Angles like the Ascendant and Midheaven, and planetary hours, are calculated for your exact location and time, not estimated.
Do I need to know my exact birth time to use these tools?
For the Big 3 and a general natal chart, sun and moon sign only need your birth date; a known birth time sharpens the Moon and adds your rising sign and house placements. For anything angle-dependent, like planetary hours, your Saturn return, or a personalized electional reading, an exact time and location make the result far more precise.
What's the difference between the free tools and a personalized reading?
The free tools compute the sky itself, the same for everyone: the best general dates for weddings, launches, and other beginnings, and the mechanics of your own chart, its wheel, aspects, and Big 3. A personalized reading goes further, reading your full chart as a whole and weighing a chosen date or moment specifically against it, done by hand rather than by table.