Naisargik Ayu Method of Longevity Calculation

The Naisargik Ayu method is used when the Moon is stronger than both the Sun and Ascendant in a birth chart. It reflects the natural vitality granted by each planet at its point of deep exaltation. Unlike Pindayu, which uses planetary arcs, Naisargik Ayu assigns fixed lifespan values to each planet and adjusts them based on dignity and affliction.

This method is ideal for charts where mental strength (Moon) dominates physical or solar vitality. The Haran (deduction) rules are the same as in Pindayu, including reductions for combustion, inimical signs, and above-horizon placements.

Pindayu Method of Longevity Calculation

The Pindayu method is a classical Vedic technique for estimating human longevity based on planetary positions, strengths, and dignity. It is applied when the Sun is stronger than the Moon and Ascendant.

Amsayu Method of Longevity Calculation

The Amsayu method is one of the classical techniques in Vedic astrology used to estimate a person's lifespan. It is applied when the Ascendant (Lagna) is stronger than the Sun and Moon, and relies on the Navamsa divisions of planetary longitudes. Unlike Pindayu or Lagnayu, Amsayu emphasizes mathematical precision and planetary dignity, offering a karmic snapshot of vitality and longevity.

This method is especially useful for astrologers seeking a quantitative Ayurdaya estimate, and it integrates Bharan Sanskar (enhancement) and Haran Sanskar (reduction) based on planetary strength, exaltation, retrogression, and debilitation.