Calculate Your Birth and Fate Numbers Birth Number and Fate Number Calculator calculates your birth number and your fate number. Your birth number, also called psychic number, mainly defines your character and your fate number also called destiny number, often repeats itself in your life and shows what your destiny is. Birth number is the day of your birth date reduced to a single digit. Destiny number is the number of your full date of birth reduced to a single digit. Your free numerology software with fantastic features is here.