To find out the remainder of the Daśā operating at the time of birth, first find out the expired portion of the Daśā of the concerned planet. This is done as follows. Multiply the Daśā period of the planet concerned by the period of the stay of the Moon in the Janma Nakshatra that has expired and divide it by the total period of the stay of the Moon in that nakshatra. The figure in years, months etc. so arrived at will be the expired period of the Daśā. If this figure is deducted from the total period of the Daśā, we will get the balance of Daśā at the time of birth.

दशा साधन हेतु 4, 3, 4, 3 इस क्रम से आर्द्रा (या कृत्तिका) से — पाप-ग्रह में 4 नक्षत्र और शुभ-ग्रह में 3 नक्षत्र समझें। इसी प्रकार जन्म-नक्षत्र तक गिनकर यथाक्रम दशेश जानें।