Which zodiac decan are you?
12 signs · 36 nuances
Your sign is only the beginning
Each sign spans 30 degrees and is divided into three decans. Your date reveals which nuance of its energy is strongest in you.
A more precise layer of your Sun sign
Which part of your sign represents you?
The first decan concentrates the sign’s essence; the second adds a new tone and the third completes its evolution. This calculator uses the modern elemental rulership system.
- 1Choose your date
- 2We find your decan
- 3Discover your combination
♈Aries
♉Taurus
♊Gemini
♋Cancer
♌Leo
♍Virgo
♎Libra
♏Scorpio
♐Sagittarius
♑Capricorn
♒Aquarius
♓Pisces
- Element
- Sign ruler
- Co-ruler
- Approximate dates
The formula behind your energy
Your sign
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Your nuance
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Your archetype
The gift you bring
The challenge that balances you
How you love
Talent and purpose
Two people can share a zodiac sign and still express it very differently. Zodiac decans offer one traditional explanation: each sign contains three ten-degree sections that add a particular nuance to its character.
What is a zodiac decan?
The zodiac wheel contains 360 degrees. Each of its twelve signs spans 30 degrees and can be divided into three ten-degree sections: the first, second and third decan. This creates 36 zodiac nuances.
Your sign does not change. The decan adds a second tone: the first intensifies the sign’s core nature, while the second and third receive the influence of the other signs that share its element.
The three decans
| Decan | Degrees | Symbolic reading |
|---|---|---|
| First | 0°–9°59′ | The sign’s essential nature and main ruler. |
| Second | 10°–19°59′ | A nuance from another sign of the same element. |
| Third | 20°–29°59′ | The element is completed by its third sign. |
The 36 decans and their co-rulers
| Sign | First decan | Second decan | Third decan |
|---|---|---|---|
| Aries | Mar 21–30 · Mars | Mar 31–Apr 9 · Sun | Apr 10–19 · Jupiter |
| Taurus | Apr 20–29 · Venus | Apr 30–May 10 · Mercury | May 11–20 · Saturn |
| Gemini | May 21–30 · Mercury | May 31–Jun 9 · Venus | Jun 10–20 · Uranus |
| Cancer | Jun 21–30 · Moon | Jul 1–11 · Pluto | Jul 12–22 · Neptune |
| Leo | Jul 23–Aug 1 · Sun | Aug 2–12 · Jupiter | Aug 13–22 · Mars |
| Virgo | Aug 23–Sep 2 · Mercury | Sep 3–12 · Saturn | Sep 13–22 · Venus |
| Libra | Sep 23–Oct 2 · Venus | Oct 3–12 · Uranus | Oct 13–22 · Mercury |
| Scorpio | Oct 23–Nov 1 · Pluto | Nov 2–11 · Neptune | Nov 12–21 · Moon |
| Sagittarius | Nov 22–Dec 1 · Jupiter | Dec 2–11 · Mars | Dec 12–21 · Sun |
| Capricorn | Dec 22–31 · Saturn | Jan 1–10 · Venus | Jan 11–19 · Mercury |
| Aquarius | Jan 20–29 · Uranus | Jan 30–Feb 8 · Mercury | Feb 9–18 · Venus |
| Pisces | Feb 19–29 · Neptune | Mar 1–10 · Moon | Mar 11–20 · Pluto |
Why do some sources show different rulers?
There is more than one system. Hellenistic and medieval astrology uses planetary “faces” in a traditional sequence; much modern astrology uses elemental triplicities. This calculator states clearly that it follows the second model so the two interpretations are not mixed.
How to read your result
Read the sign as the foundation and the co-ruler as an accent. The result combines them across personality, gift, challenge, love and purpose. Astrology is a symbolic language rather than a scientific diagnostic or prediction method; use this reading for reflection and entertainment.