The Lagna is the sign rising on the eastern horizon at the moment you were born — it changes every two hours, which is why your birth time is required here.
Deterministic Vedic calculation (Lahiri ayanamsa). No signup required.
If the Moon sign is the mind and the Sun sign the soul's purpose, the Lagna is the vessel: body, temperament, and the frame that assigns all twelve houses of your chart. Two people born the same day with the same Moon sign can live very different lives because their Lagnas — and therefore every house lordship in their charts — differ.
Because the ascendant sweeps through the entire zodiac each day, it is the one calculation where birth-time accuracy truly matters: even 15 minutes can occasionally change the rising sign near a boundary. This tool computes the exact sidereal ascendant degree for your time and place, so you also learn how close to a boundary you are.
The Lagna, or ascendant, is the zodiac sign rising on the eastern horizon at your exact birth time and place. It anchors the twelve houses of your chart and represents your body, temperament, and approach to life.
The ascendant changes sign roughly every two hours, so the Lagna cannot be known from the date alone. A birth certificate or hospital record is the best source.
Enter your best estimate — the result will show the ascendant degree, so you can see whether you're near a sign boundary where a small time error could change the answer.