Free Jupiter Sign Calculator

Your Jupiter sign is the zodiac sign Jupiter occupied at the moment of your birth. Jupiter takes about twelve years to circle the zodiac, and Helena Avelar and Luis Ribeiro put its stay at roughly a year in each sign.[1] James Evans gives the average period as 11.86 years.[2] Everyone born during the same year-long stretch shares the sign, so it describes a birth cohort as much as a person. The house Jupiter falls in and the aspects it makes are what individualize it.

Vettius Valens gives the ancient list of what Jupiter can signify, and it is long. It includes childbearing, friendships with great men, offices, and inheritance, among many others.[3]Abu Ma'shar sets the boundary a calculator needs: not everything a planet signifies “will be gathered together within a single man.” Which topics apply depends on the planet's condition and its place among the houses.[4]

The sign alone also cannot promise good fortune. Valens writes that benefics favorably situated bring their proper effects, and that “if however they are unfavorably situated, they are indicative of reversals.”[3]He reads the sign together with the aspects and conjunctions, so Jupiter's sign is one input to that judgment.

Ptolemy explains the benefic label through the physics of his time. Jupiter's sphere sits between Saturn's cooling and Mars's burning, so its power is temperate: it heats and moistens, with heat the stronger. Because the hot and the moist were the fertile, active humours, he reports that the ancients counted Jupiter, Venus, and the Moon as beneficent.[5]That is a historical explanation grounded in temperament. The label describes the planet's nature rather than a guaranteed outcome.

The same tradition places Jupiter in the day sect. Ptolemy lists the Sun and Jupiter as diurnal,[5] and Rhetorius names the Sun, Saturn, and Jupiter as rulers of the sect in diurnal nativities.[6]Chris Brennan treats sect as a qualitative factor that changes a planet's benefic or malefic character more than its strength. In his words, “benefics become less benefic when they are contrary to the sect,” and Jupiter in a night chart stays moderately positive.[7]

Rhetorius adds a boundary that runs both ways. Malefics well placed by phase, sect, and house can magnify good fortune, while “the benefics badly placed damage them.”[6] Benefic names what Jupiter tends toward. Its condition in a given chart decides how much of that arrives.

This table gives Jupiter's sign for every birth date from 1930 through 2030, generated from the same engine that runs the calculator. Jupiter usually changes sign once a year. When it turns retrograde near a boundary, it steps back into the previous sign and then crosses again, so some rows list more than two entries. 1938 is one example: Aquarius until May 13; Pisces May 14 to Jul 29; Aquarius Jul 30 to Dec 28; Pisces from Dec 29.

Each date is the Universal Time date of the ingress. On that date the earlier hours still belong to the previous sign, so a birth on an ingress date needs a birth time. The calculator above settles it from your time and place.

As of October 18, 2026, Jupiter is in Leo.

Next sign changes

• July 26, 2027: Jupiter enters Virgo
• August 24, 2028: Jupiter enters Libra
• September 24, 2029: Jupiter enters Scorpio
• October 22, 2030: Jupiter enters Sagittarius

Ptolemy assigns Jupiter two domiciles, Sagittarius and Pisces. He places its exaltation in Cancer, where Jupiter “reaches farthest north” and brings its power to fullness, and its depression, now usually called fall, in Capricorn.[5] Rhetorius gives a different reason for the exaltation: Jupiter rules life and abundance and Mars rules death, so where one is exalted the other falls.[6] The tradition agrees on the signs and offers more than one account of why.

Detriment, the sign opposite a domicile, puts Jupiter in Gemini and Virgo. The label arrived late: Brennan notes that most introductory Hellenistic texts define domicile, exaltation, and depression but give no definition of detriment, and that the position is clearly treated as a negative factor only toward the end of that tradition, in Rhetorius.[7]Dignity describes the planet's condition in the sign and carries no judgment of a person's worth. Firmicus shows why: his entry for Jupiter in Virgo opens with natives who are “courteous, respected, well-bred, modest, successful, faithful.”[8]

Esoteric astrology uses a separate scheme. Alan Oken's Soul-Centered Astrology names Jupiter the soul-centered ruler of Aquarius.[9] The calculator keeps that esoteric rulership out of the dignity it displays, which follows the traditional table: domicile in Sagittarius and Pisces, exaltation in Cancer, detriment in Gemini and Virgo, and fall in Capricorn. In the other six signs the result shows no dignity label. The essential dignities calculator adds triplicity, term, and face for every planet in your chart.

When you enter a birth time, the result marks your chart as a day chart or a night chart. Jupiter belongs to the day sect, so in a day chart it is in sect, and in a night chart it is contrary to sect. Brennan reads the night chart case as a change in quality: Jupiter becomes less benefic there and remains moderately positive.[7]

Demetra George shows the method with triplicity rulers. Jupiter is the night ruler of the fire triplicity, so in a night chart Jupiter in Leo is its own triplicity lord, which she calls “the most powerful position possible.” Jupiter has no place among the water triplicity lords, so in her Scorpio by night example it gets no such support.[10] Her examples teach method. They show why two people with Jupiter in one sign can receive different readings.

Sect cannot be read without a birth time. When the time is unknown, the calculator shows no sect at all. The sect calculator sorts every planet in your chart by sect.

The house places Jupiter's topics in an area of life. Among the houses, the traditional joy of Jupiter is the eleventh, the place of Good Spirit. Demetra George writes that “Benefic Jupiter rejoices in the eleventh house of the Good Daimon/Spirit,”[10] and Brennan lists the same joy. He also reports a general notion, especially in Valens, that benefics become more benefic there.[7]

The popular link between Jupiter and the ninth house comes from a modern convention that pairs each house with a sign in zodiacal order, so the ninth corresponds to Sagittarius. Gargatholil states it directly: “Jupiter rules the Ninth House.”[11]That correspondence is thematic. Domicile is a relationship between a planet and a sign, and in George's account the ninth house is the joy of the Sun.[10]

Rhetorius uses “rejoice” in further senses. Jupiter, Saturn, and Mars rejoice as morning risers, in the quadrants from the Ascendant to the Midheaven and from the Descendant to the IC, and as diurnal planets above the earth by day.[6] When someone says Jupiter is happy in a place, ask which sense they mean. The planetary joys calculator checks the house joys in your chart.

Early texts say little about retrograde planets, and what they say leans toward delay. Valens writes that planets past the first station “delay expectations, actions, profits, and enterprises” until the second station restores them, in a passage about timing periods and transits.[3] Brennan reports that the surviving texts mention retrograde planets infrequently and interpret them ambiguously, with delay the common reading.[7]Rhetorius calls the retrogrades of the stars inactive and weaker, though that reading of his text rests on Kroll's emendation of the manuscripts.[6]

Modern astrologers read it differently. George writes that they “reframed the concept of retrograde planets as an internalization of that planetary function.” She also reports Robert Schmidt's suggestion, from personal teaching, that retrograde benefics take back the good they have given.[10] Steven Forrest lists a deeply rooted inner faith for retrograde Jupiter and adds that it may produce a very serious exterior.[12]

A retrograde Jupiter is common. In the engine data for 1930 through 2030, Jupiter is retrograde on 30 percent of days, and one retrograde period averages 121 days. Forrest describes about four months retrograde followed by nine or ten direct,[13] and Evans gives the average interval from one retrograde to the next as 399 days.[2] The retrograde planets calculator lists every retrograde planet in your chart.

Two ancient witnesses delineate Jupiter sign by sign. Firmicus Maternus's Mathesis V.IV runs from Aries through Capricorn, and the surviving text breaks off after the Capricorn entry.[8]The Pseudo-Manetho poem, in J. L. Lightfoot's edition, treats Jupiter in Leo and in Cancer, the signs of the Sun and Moon. Lightfoot calls the Cancer entry “an accumulation of topoi associated with worldly success.”[14] No ancient delineation of Jupiter in Aquarius or Pisces survives in the texts reviewed for this page.

The two witnesses do not always agree. Firmicus opens Jupiter in Leo with “Trouble and weariness” until a later Saturn transit brings relief,[8] while the poem has Jupiter glad in Leo, making kings and their companions admired and rich.[14] The tradition was not uniform.

These entries describe rank, offspring, patrons, and wealth in a Greco-Roman social world, usually timed by later transits and conditioned on the rest of the chart. Firmicus closes his Gemini entry by saying all of it is indicated “according to the computation of the chart.”[8] They are predictions about a life in that world, and this page reports them as history rather than as personality profiles.

Modern sign surveys disagree mainly about the question they ask of the sign. Each author below reads Jupiter's twelve signs through a different lens, so a sign description is most useful when you know which lens produced it.

Sasportas's pairing of Jupiter in Aries with Jupiter in the 1st house is a teaching shortcut for a shared theme. The sign and the house remain two separate placements, and the ninth house pairing gives Jupiter neither a domicile nor a joy there.

Demetra George's rule is that before interpreting a planet the astrologer “must first determine its condition.”[10] The result follows that order. If you entered a birth time, start with sect: a day chart puts Jupiter in sect, and a night chart puts it contrary to sect. Then read dignity, then the house, and take the sign description as the style of the placement. Aspects need the full chart; the birth chart calculator lists them.

Alan Oken makes the whole chart point with Jupiter in Sagittarius itself. In a Pisces chart or a Capricorn chart its outgoing nature stays the same, “but its expression would work out quite differently.”[19]Two people with the same Jupiter sign share a cohort pattern, and the rest of each chart decides how it plays out. Jupiter's cycle adds timing: the Jupiter return calculator finds when transiting Jupiter comes back to your natal degree.

The calculator receives Jupiter's position from the Rust engine, which reads the JPL DE440s ephemeris through ANISE. Longitudes use the tropical zodiac referred to the true equinox of date. The dignity label and the retrograde flag come from the same engine response, and so does sect, which the engine sets from whether the Sun is above the horizon at birth.

When the birth time is unknown, the engine uses noon at the birthplace, with the time zone taken from the longitude. Jupiter moves slowly enough that the sign almost always holds; a birth on an ingress date is the exception, and the result flags a placement close to a sign boundary. A house and a sect do not hold without a recorded time, so the result leaves both out. With a known time and place, the calculator requests no house system, and the engine applies its default, whole sign houses.

The birth year table and the next sign changes come from the engine's own ingress and station search for 1930 through 2030. Every date in them is the Universal Time date of the event.