Breakdown birthdate into 2 digit blocks for month, day, and year
MM + DD + YY + YY
If sum is a 2 digit number, add digits together for 1st birth card. Then divide into 2 digits again for 2nd birth card if you get a single digit; otherwise reduce to 1 digit.
Ex: 11 + 22 + 20 + 00 = 53
5 + 3 = 8: Strength, 1st card
8 = 1 + 7 = 17: The Star, 2nd card
Ex: 07 + 30 + 19 + 26 = 82
8 + 2 = 10: The Wheel of Fortune, 1st card
1 + 0 = 1: The Magician, 2nd card
If sum is 3 digit number, add first 2 digits with 3rd digit as a separate # for 1st birth card. Then add digits to find 2nd card or reduce to 1 digit.
01 + 13 + 19 + 97 = 130
13 + 0 = 13, Death, 1st card
1 + 3 = 4, The Emperor, 2nd card
Exception: When sum = 19, there's 3 birth cards.
Reason: Not very clear why you'd get 3 birth cards if your sum is 19.
Combos (the querent's life journey)
21 > 3: The World, Empress
Path of self-actualization guided by love.
20 > 2: Judgement, High Priestess
Path of rebuilding yourself by following intuition
19 > 10 > 1: The Sun, The Wheel, The Magician
Path of adapting to change with grace, abundance, peace
18 > 9: The Moon, The Hermit
Path of finding clarity in darkness and truth in uncertainty.
17 > 8: The Star, Strength
Path of finding hope by pulling from inner strength.
16 > 7: The Tower, The Chariot
Path of restoring balance guided by discipline.
15 > 6: The Devil, Lovers
Path of controlling desire by staying grounded. Sensuality guided by love.
https://labyrinthos.co/blogs/learn-tarot-with-labyrinthos-academy/how-to-calculate-your-tarot-birth-card-plus-short-birth-card-meanings-infographic