Drekkana (D3, Dreshkana) divides each rasi into three parts of 10 degrees. The first drekkana stays in the same rasi, the second moves to the 5th from it, and the third to the 9th, the same as Kundli Maker. The chart is read from the Drekkana of the rising sign as house 1. Classical practice uses it as the chart of siblings, courage and self-effort: the 3rd from this D3 lagna for younger co-born, the 11th for elder siblings, with Mars as the natural karaka of courage and Mercury often read with skill and younger brothers or sisters. A planet that looks strong in the birth chart but falls in a weak Drekkana tends to deliver less for effort and co-born than it appears to, and the reverse also holds. This page draws the chart. It is not a count of how many siblings you will have.
This page is that Parashari D3: North and South Indian drawings, a D1-to-D3 table with amsa and BPHS drekkana rishi (Narada, Agastya, Durvasa, reversed in even signs), the natal 3rd lord in D3, and Mars and Mercury as karakas. It is the same Drekkana as the D3 dropdown on Kundli Maker, focused here as its own calculator. It is not Bhratru Shraapa (an affliction check on the brother), not Children - Saptamsha (D7) Chart (children), not the Marriage - Navamsha (D9) Chart (dharma and marriage), not Chara Karaka (Bhratrikaraka by degree), and not Vimsopaka Bala (D3 as one weighted varga).
Enter the exact birth time and pick the city from the dropdown. Each drekkana is 10 degrees, wider than Navamsha, but Lagna still changes D3 sign at those 10-degree marks. Results are free to share or save as a PDF. Editorial pages are reviewed by Astro Arpita Nath.