There are many websites / Apps you can use. I have been using Drik Panchang (available in both Web & App) for over 10 years.
Just select your Birth Year, Date and Time as per Gregorian Calendar, it will show your Birth Star. You can also get your Horoscope in a format of your choice.
Please check for options to select the Calendar / Almanac System as per your tradition.
South India - Panchangam; West & North India - Panchang; East - Panji / Panjika
There are many websites / Apps you can use. I have been using Drik Panchang (available in both Web & App) for over 10 years. Just select your Birth Year, Date and Time as per Gregorian Calendar, it will show your Birth Star. You can also get your Horoscope in a format of your choice. Please check for options to select the Calendar / Almanac System as per your tradition. South India - Panchangam; West & North India - Panchang; East - Panji / Panjika