Jupiter Sign Calculator

What Your Jupiter Sign Describes

Jupiter describes growth and faith: what you believe in, what you are generous with, where you take risks and how you look for meaning. A Sagittarius Jupiter may grow through travel and big ideas; a Virgo Jupiter may grow through skill and useful work. Read more about Jupiter in astrology.

How the Jupiter Sign Is Calculated

Jupiter circles the zodiac in about 12 years, spending 9 months in a sign on average. Each year it turns retrograde for about four months, and a retrograde near a cusp can carry it back into the previous sign for a few weeks or months. Everyone born within the same year or so shares a Jupiter sign, which is why astrologers read it alongside the house it falls in.

Every 12 years Jupiter returns to the sign it held at your birth, around ages 12, 24, 36, 48 and 60.

Why Birth Time Matters

Jupiter changes sign on only about 1 day in 232. For almost every birthday the date alone gives the sign, and the birth time adds the exact degree and the house. If Jupiter changed sign on your birth date, the calculator shows both signs and tells you so.

With your birth time and place, the result also gives the exact degree and the house, the area of life where this placement works.

How Accurate Is It?

Positions come from Selfgazer's astrology engine, the same one that draws the chart in your astro room: VSOP87 planetary theory through Astronomy Engine, with Chiron from Swiss Ephemeris tables. Tested against the Swiss Ephemeris, planets agree to within half an arcminute and house cusps to within a tenth of an arcminute. Your local birth time is converted with your birthplace's historical time zone rules, including past daylight saving changes. Everything is calculated in your browser, and nothing you enter is stored.