Which inputs produce a reliable result
For chart-based tools, birth date, birth time, birth place, and timezone matter most. An approximate hour can shift lagna and house-based reading, so hospital notes or a family kundli time are safer than guessing.
For Panchang or muhurta tools, place, date, and timezone are required. The empty page does not assume New Delhi, today, or Asia/Kolkata until you submit the form or grant Current location.
If geocoding is unclear, edit coordinates. Wrong place data can move both sunrise-based angas and lagna-based conclusions.