Find your birth date, exact birth time, and birth place
Get your birth chart prepared using a reliable astrology source or astrologer
Locate the Moon’s position at the time of birth
Identify the zodiac sign where the Moon was placed
That Moon sign is your Rasi
Use a Rasi calculator if you do not know how to read a chart
Verify the result with an accurate birth time, since Rasi depends on the Moon’s exact position