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Astrology · Neptune

Neptune
sign calculator

Neptune dissolves — longing, mysticism, confusion. It makes boundaries porous and meanings fleeting: art is born here, compassion happens here, but clarity also gets lost here. Neptune shows where you are open to something larger, and where you must be careful not to fool yourself with fog.

Without time we cannot compute ascendant or houses.

Only your birth date is needed — no time required.

How it works

Three steps to your Neptune

  1. Enter your birth data

    Your birth date is enough. You only need a time for the house.

  2. Calculate the position

    We use the Swiss Ephemeris engine — the same calculation base professional astrology software runs on. Arc-second accuracy, free.

  3. Read the interpretation

    You instantly see your sign — plus a clear explanation of what it says about you, and a link to the matching interpretation.

Neptune — frequently asked questions

Do I need my birth time for the Neptune?
No. Neptune stays in one sign for about 14 years — your birth date is more than enough. Neptune is a generational planet: a whole age cohort shares the same Neptune sign.
What does my Neptune sign say about me?
Your Neptune sign shows how Neptune expresses itself in your chart. Enter your birth date, find your sign, and read the full interpretation below.
Is the Neptune calculator free?
Yes. The calculator is completely free and needs no sign-up. We only ask for your email when you want to connect the result to your full birth chart.

See your whole chart

Neptune is just one point. Build your full birth chart with every planet, point, house and aspect — free.

Build my birth chart

Free, no sign-up.

The Astro Academy

Learn Astrology & Tarot in 30 days.

5 minutes a day · quizzes, spaced review, streaks. Astrology, tarot, runes and numerology — structured from the ground up.

Day 1–71

Sun, Moon, Ascendant

  • The three pillars
  • Elements and modalities
  • House framework
Day 8–142

Planets and their roles

  • Personal planets
  • Social & transpersonal
  • Reading retrogrades
Day 15–213

Aspects and transits

  • Spotting aspects
  • Reading transits
  • Working with moon phases
Day 22–304

Reading your own chart

  • Chart synthesis
  • Houses in daily life
  • Your daily practice
After 30 days I read my own chart — and honestly my friends’ too. The quizzes are what made it click.
Marie, 34 · Berlin
4,9 / 5

from 1,200+ reviews · 2,400+ active learners

    Neptune Calculator — Free · The Astro Academy