Enter your birth date, time and place above and this free Lagna calculator shows your sidereal ascendant: the rising sign with its exact degree, its nakshatra and pada, and its lord. It also gives the window of clock time on your date of birth during which that same Lagna was rising, and warns you when your birth time is close to a change of sign. Your ascendant, or Lagna, is the sign that was rising on the eastern horizon at the moment you were born, and it sets the entire house structure of your chart.
How this calculator works
The ascendant is computed from the local sidereal time at your birth place, using the Lahiri ayanamsa, all worked out in your own browser by our ephemeris. The planetary positions are read from tables calculated from NASA JPL DE440, and agree with it to within a few seconds of arc for births from 1899 to 2075; outside those years a compact series is used and the result says so. The time zone in force at your birth place on your birth date, including daylight saving, is applied automatically. The working is done in your browser. Once your email is confirmed, the birth details you enter and the headline of the result are kept with it, so that our emails can fit your chart (see the privacy policy).
Because the ascendant depends on the precise moment and place of birth, the calculator also shows the range of clock time either side of your stated birth time during which the same sign was rising. A sign takes two hours to rise on average, at every latitude, but the real time varies. Near the equator each sign takes close to two hours; at higher latitudes some signs rise in under an hour and others take nearly three, so the calculator states the actual window for your birth place rather than the average.
Reading your result
Your Lagna is shown with its exact degree and the nakshatra and pada it falls in, since the ascendant has its own nakshatra just as the Moon does. The time window alongside it shows how much room for error your birth time has before the Lagna would change to the sign before or after. A birth time that sits well inside the window, an hour or more from either end, means small errors will not change your Lagna. A birth time within a few minutes of either end means they might, and the calculator says so when you are within twenty minutes of a change. In that case it is worth confirming your birth time from a hospital record rather than family memory.
Where traditions differ
Sign-based Vedic astrology, the whole-sign house system this calculator and this site use, treats the entire sign containing the Lagna as the first house, each following sign as the next house in order. Other systems, more common in Western astrology and in the Krishnamurti Paddhati branch of Vedic practice, divide houses by unequal cusps calculated from time rather than whole signs, which can place the same planet in a different house near a cusp from an identical birth chart. This calculator gives you the sign-based Lagna; a source using cusp-based houses may read a placement near a boundary differently, a genuine difference in method, not an error in either one.
What it cannot tell you
This calculator gives you the Lagna itself, its degree, its nakshatra, and how sensitive it is to your stated birth time. It does not build the houses that follow from it, the planets that fall in each one, or the yogas and doshas those placements form, all of which need the full chart. See the free kundali tool for that. If your result shows a narrow time window and you are not confident in your recorded birth time, treat the Lagna shown as provisional until you can confirm it.
Frequently asked questions
↳ What is an ascendant or Lagna?
Your ascendant, or Lagna, is the zodiac sign that was rising on the eastern horizon at the exact moment and place of your birth. It becomes the first house of your chart, and every other house is counted onward from it, which makes it one of the most important placements in the whole reading.
↳ How accurate does my birth time need to be for my ascendant?
As accurate as you can get it. A sign rises in roughly two hours on average, so a birth time that is off by ten or fifteen minutes rarely changes the result, but a birth time near the edge of that window can shift your Lagna to the sign before or after. This calculator shows the exact window for your birth place, so you can see how much margin your own result has.
↳ What if I do not know my exact birth time?
The ascendant is the one calculation on this site where an accurate birth time matters most, since it changes roughly every two hours rather than staying stable across a whole day like a Moon sign does. If your time is uncertain, treat the result as provisional and, where possible, confirm it against a hospital record or birth certificate rather than family recollection.
↳ Does my ascendant have its own nakshatra?
Yes. The Lagna falls at a specific sidereal degree just as a planet does, so it sits within one of the twenty-seven nakshatras and one of that nakshatra's four padas. This calculator shows both alongside the Lagna sign itself.
↳ Why does another site show a different house for the same planet?
Most likely because it uses a different house system. This calculator uses whole-sign houses, the standard in most Vedic practice, where the entire sign containing the Lagna is the first house. Some software, particularly in the Krishnamurti Paddhati tradition, divides houses by calculated cusps instead, which can place a planet near a boundary in a different house even from the same birth details.
↳ What is the lagna lord?
The lagna lord is the planet that rules the sign of your ascendant. For example, Mars rules Aries and Scorpio, Venus rules Taurus and Libra, and Jupiter rules Sagittarius and Pisces. The calculator names your lagna lord with the result, and the full chart in the free kundali shows where it stands.
↳ What is the difference between lagna rashi and Chandra rashi?
Your lagna rashi is the sign that was rising in the east at the moment of birth, and it changes about every two hours. Your Chandra rashi is the sign the Moon was in, and it changes about every two and a quarter days. Many Indian horoscopes use the Moon sign, which you can find with the Moon sign calculator.
↳ How is the lagna calculated?
From your birth date, time and place the calculator finds the local sidereal time at the birth place, works out which degree of the zodiac was rising on the eastern horizon, and converts it to the sidereal zodiac with the Lahiri ayanamsa. The time zone and any daylight saving in force at that place on that date are applied automatically.
↳ Is my Vedic ascendant different from my Western rising sign?
Often, yes. Vedic astrology uses the sidereal zodiac, which today sits about 24 degrees behind the tropical zodiac used in Western astrology. So the Vedic lagna is frequently one sign earlier than the Western rising sign. Neither is wrong; they measure the zodiac from different starting points.
For the full chart built from this Lagna, houses, planets, yogas and doshas included, use the free kundali tool. If your birth time is uncertain and you would like help confirming it, see consultation.