Jupiter sign calculator: what is my Jupiter sign?

Jupiter is the largest planet, and astrology has long called it the great benefic. It stands for growth, belief, generosity and the sense that things will work out: where you expand, what you trust and how you share. Your Jupiter sign is the sign it stood in when you were born. It shows the style of your optimism and where you tend to reach too far or not far enough.

Jupiter circles the zodiac in about 12 years and stays in a sign for roughly a year, so everyone born in the same twelve-month stretch shares it. That is why the house matters on this page: it turns a shared sign into a personal placement.

Jupiter moves into a new sign about once a year and returns to the same sign after roughly 12 years (11.86, to be exact). Your Jupiter sign therefore comes back around near ages 12, 24, 36, 48 and 59, the times astrologers call a Jupiter return and read as a fresh start in what you are growing toward.

To see where Jupiter is today against your own placement, the transit chart calculator lays the current sky around your birth chart. A year in the sign you were born with is often described as a good year to act on what you believe in.

Jupiter is retrograde for about four months of every thirteen, so roughly three people in ten are born with it. Seen from Earth the planet seems to move backward while our planet overtakes it, which the retrograde entry explains. The calculator marks it with ℞ whenever Jupiter was moving backward on your birth date.

Astrologers read a natal retrograde Jupiter as growth that works inwardly first: you work out what you believe in private before it shows outside. It describes timing and style, and the sign still tells you where the growth happens.

In the traditional scheme Jupiter rules Sagittarius and Pisces and is exalted in Cancer. In Sagittarius it is the teacher and traveler, in Pisces the faith and compassion, in Cancer the one who feeds others. It is in detriment in Gemini and Virgo, where it is pulled toward detail and variety, and in fall in Capricorn, where caution slows its optimism.

Traditional astrologers called a strong Jupiter fortunate, and modern readings keep that idea: it marks where support is easier to find. What you do with it is up to you. The short readings above give the flavor of each sign.

With a birth time and place the calculator gives the house Jupiter was in, Placidus by default, or whole sign, Koch and equal houses on the switch. Jupiter in the second house is read as growth through earning and values, in the seventh through partnership, in the ninth through travel, study and belief, and in the tenth through career standing. Without a time the house stays open.

Aspects add detail. Jupiter close to the Sun or Moon tends to lend that part of you an easy confidence, while hard aspects ask you to watch for excess. The birth chart calculator shows Jupiter with every aspect it makes.

Jupiter's position comes from the VSOP87 planetary theory, corrected for the time light takes to reach Earth and for the nutation of Earth's axis, which gives the apparent longitude astrologers use. In our checks it agrees with NASA JPL Horizons to within about one arcsecond on test dates between 1923 and 2077. The tool covers 1900 to 2099.

Jupiter moves at most about a quarter of a degree a day, so it rarely changes sign on a birthday. When it does, the calculator shows both signs and the time of the changeover, and a birth time names the right one.

Your birth date and birthplace are enough for the sign. The birth time adds the house. The tool is free and needs no account.

From here, the birth chart calculator draws Jupiter among your other planets, the Saturn sign calculator looks up the planet that balances Jupiter in traditional astrology, and the transit chart shows where Jupiter stands now.