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Sun & Moon Sign Calculator

Enter your date of birth, exact birth time, and timezone to discover your Sun Sign, Vedic Moon Sign (Rashi), Nakshatra, and a combined reading.

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24-hour clock

What is a Sun Sign?

Your Sun Sign is determined by the position of the Sun at the moment of your birth. It represents your core identity, your outward personality, and the traits you most naturally express in day-to-day life. Because the Sun moves through each zodiac sign over roughly one month, your Sun Sign is determined by your date of birth alone — birth time is only needed if you were born on a cusp date.

What is a Moon Sign (Rashi)?

Your Moon Sign (called Rashi in Vedic astrology) is determined by the position of the Moon at the time and place of your birth. It represents your inner emotional world — how you feel, what you need for emotional security, and how you respond instinctively to life. The Moon moves through all 12 signs in just 27–28 days, spending roughly 2.5 days in each sign, so birth time and timezone matter significantly.

What is a Nakshatra?

A Nakshatra is one of 27 lunar mansions used in Vedic astrology, each spanning 13°20' of the sidereal zodiac. Your Moon Nakshatra provides a finer layer of meaning beyond your Rashi — each Nakshatra has its own deity, ruling planet, symbol, and qualities. Each Nakshatra is further divided into 4 Padas (quarters) of 3°20' each, giving 108 total positions.

How This Calculator Works

  1. Your date of birth is used to determine your Sun Sign via the standard tropical zodiac date-range lookup.
  2. Your birth date, time, and timezone are converted to UTC using full DST-aware IANA timezone handling.
  3. The Moon's tropical ecliptic longitude is computed using the Meeus astronomical algorithm (Chapter 47, ~59 periodic terms, T⁴ corrections).
  4. The Lahiri ayanamsa is subtracted from the tropical longitude to obtain the sidereal longitude — the standard method in Vedic/Jyotish astrology.
  5. The sidereal longitude (0°–360°) is divided into 12 × 30° segments for the Rashi, and 27 × 13°20' segments for the Nakshatra.
  6. A combined Sun + Moon reading is generated based on the element pairing of your two signs.

Frequently Asked Questions

Why do I need birth time for Moon Sign?

The Moon moves through a zodiac sign every 2–2.5 days. Without an accurate birth time, the calculator cannot determine which sign the Moon was in on your birth date — especially if you were born near a sign change. For Nakshatra and Pada, even an hour's difference can shift the result.

Why does the Moon Sign use Vedic/sidereal calculation?

The Moon Sign (Rashi) shown here uses the sidereal zodiac with the Lahiri ayanamsa — the standard system in Vedic and Indian astrology. This differs from the Western tropical system by approximately 23–24° currently, which typically shifts the Moon into the previous sign compared to a Western calculator. This gives the correct Jyotish result.

What does "born on a cusp" mean?

A cusp is the 1–2 day window when the Sun transitions from one zodiac sign to another. If you were born in this window, the Sun may have been in either of the two neighbouring signs depending on the exact year and time. The calculator shows a cusp notice when this applies.

What does the combined Sun + Moon reading show?

The combined reading describes how your Sun Sign's outer personality and your Moon Sign's inner emotional nature work together. It is based on the element pairing — for example, Fire Sun with Water Moon creates a dynamic tension between confidence and emotional depth.

Can I embed this calculator on my website?

Yes: calculate your signs first, then use the "Copy Embed Code" button in the Share section. You'll get a ready-to-paste iframe snippet that automatically resizes to fit the content.