Vedic Moon sign calculator: find your rashi

Last updated 25 October 2026

Enter your date and time of birth and the calculator places the Moon in its sidereal sign for that moment: the sign Indian astrologers mean when they ask for your rashi. Below the calculator: how the answer is worked out, what an astrologer actually does with it, and what to ask about it in a consultation.

How the calculation works

The calculator works out where the Moon was, as seen from the Earth, at the moment you were born. Your date and clock time are converted to Universal Time using the UTC offset you choose (India is UTC+5:30), the Moon's position along the ecliptic is computed for that instant, and then the Lahiri ayanamsa is subtracted to move from the seasonal zodiac to the sidereal one used in Jyotish. The result is a longitude between 0 and 360 degrees. Each sign covers 30 degrees, starting with Mesh at 0, so the longitude gives the sign directly. The same longitude also places the Moon in one of the 27 nakshatras and in one of that nakshatra's four quarters (padas), which the result shows as well.

Because the Moon is the fastest body an astrologer uses, travelling roughly 12 to 15 degrees a day, it leaves a sign every two days or so. That is why two people born a day apart can have different Moon signs, and why a birth on a changeover day needs a careful look at the clock.

What an astrologer reads from your Moon sign

In a consultation the Moon sign is a working tool rather than a personality label. Most Vedic practitioners treat the Moon as the mind: how you take in events, what unsettles you and what restores you. Its sign and the planet that rules that sign colour how the astrologer describes your emotional style. But the more practical uses are about counting.

• Transits are counted from it. When an astrologer says Saturn or Jupiter is in your fourth or eighth, they very often mean counted from the Moon sign (Chandra lagna), alongside the count from the ascendant.
• Sade Sati is defined by it. Saturn's seven-and-a-half-year passage over the sign before your Moon sign, the sign itself and the sign after is measured entirely from the Moon.
• Your planetary periods start from it. The nakshatra the Moon occupies decides which Vimshottari dasha you were born into and how much of it was left.
• Marriage matching uses it. Several of the eight kootas in guna milan, including Bhakoot, compare the two Moon signs and birth stars.

A careful astrologer will also look at the Moon's condition: whether it is waxing or waning, which planets sit with or aspect it, and which house it occupies from the ascendant. Two people with the same Moon sign can get quite different readings because of those details, which is one reason a full chart says far more than the sign alone.

When the birth time changes the answer

With a birth time entered, the calculator warns you when the Moon was within about an hour of its motion, roughly half a degree, of the edge of a sign, a nakshatra or a pada, and says what the answer would be on the other side. Without a time, it shows the whole day and the clock time of every change. Births close to a change deserve a second check: hospital records, a birth certificate or a parent's memory of the time are all worth comparing. A good astrologer will ask how confident you are about the time before relying on anything that depends on it, and may test it against events in your life (a process called birth-time rectification). Our guide on birth details for astrology covers how to find and record the time.

Questions to ask your astrologer about your Moon sign

• Are you counting transits from my Moon sign, my ascendant, or both, and which do you weigh more?
• Is my Moon strong or weak in this chart, and why?
• My Moon is close to a sign boundary: does that change anything in how you read it?
• Which current transit over my Moon sign matters most for the question I came with?
• Which ayanamsa do you use, and would another one move my Moon?

For more on framing questions so the answers are useful, see questions to ask an astrologer.

The twelve Moon signs, their rulers and birth stars

Each sign has a ruling planet, which an astrologer reads together with the Moon, and holds two and a quarter nakshatras. The quarters (padas) listed are the ones that fall inside each sign.