If you don't know your birth time
Without a birth time, the calculator checks Neptune's sign across the whole local birth day. If it changes, you get both possible readings and the approximate local change time. The degree, house and personal map links need a birth time; a sign-only share card is available when the sign is certain. You can print or save the result as a PDF.
Your Neptune sign and your generation
Johann Galle found Neptune in 1846, where Urbain Le Verrier's calculations said it should be, the first planet found by mathematics rather than by searching the sky, and astrologers read it as the planet of dreams: ideals, imagination, spirituality and the longing for something beyond the everyday, with illusion and confusion as its shadow. It takes about 165 years to go around the zodiac, spending about 14 years in each sign, so a Neptune sign marks a generation's dream, from the romance of Neptune in Libra to the collective ideals of Neptune in Aquarius.
The generations since 1901
Each row gives the birth years of one Neptune sign, counted from Neptune's first entry into the sign to its final exit; the years overlap because a retrograde loop can carry it back across the boundary. Neptune is retrograde about 43% of the time, for about five months every year.
| Neptune in | Born | Read as |
|---|---|---|
| Cancer | 1901–1916 | home, family and homeland |
| Leo | 1914–1929 | romance, glamour and the stage |
| Virgo | 1928–1943 | ideals of service and useful work |
| Libra | 1942–1957 | love, harmony and peace |
| Scorpio | 1955–1970 | the hidden: psychology and mysticism |
| Sagittarius | 1970–1984 | spiritual seekers and faraway places |
| Capricorn | 1984–1998 | questioning structures and authority |
| Aquarius | 1998–2012 | global networks and shared ideals |
| Pisces | 2011–2026 | compassion, imagination and spirit |
| Aries | 2025–2039 | heroism and new beginnings |
Neptune is in Aries now: Neptune in Aries gives every date of the passage, which runs to 2039, and what astrologers read in it.
Neptune in your birth chart
Beyond its house, Neptune becomes personal through its aspects. When it touches your Sun, Moon, Venus, Mars or rising sign, astrologers read a strong imagination and sensitivity in that part of your life, a gift for art or compassion, and sometimes a tendency to idealize, drift or escape. The birth chart calculator lists every aspect Neptune makes in your chart.
Why the house matters
The house Neptune fell in, which needs a birth time, shows where that longing becomes personal: where you idealize, create and sometimes lose your footing. Neptune in the 10th house is read as a calling to art or service, or a vague sense of direction; in the 7th, as idealized partners; in the 2nd, as a dreamy relationship with money; in the 12th, as a rich inner life and a need for quiet and solitude.
How it is worked out
The calculator finds Neptune's position at your birth from the site's own ephemeris, the same one behind every chart here, and gives the dates Neptune was in your sign. Because Neptune loops backward for about five months every year, a sign can have more than one set of dates. Your details stay in your browser.