Pythagorean numerology uses a letter-to-number conversion chart to analyze names and birth dates. This article walks you through how to calculate each core number accurately and consistently.

The Pythagorean Conversion Chart

Each letter of the Latin alphabet is assigned a numerical value from 1 to 9:

1	2	3	4	5	6	7	8	9
A	B	C	D	E	F	G	H	I
J	K	L	M	N	O	P	Q	R
S	T	U	V	W	X	Y	Z

Note: The letter Y is always treated as a consonant in the Pythagorean system.

1. Life Path Number

The Life Path Number is derived from your date of birth. The rule is to reduce each component (day, month, year) separately, then add the results and reduce one final time.

Example: Date of birth: November 29, 1995

Day: 2 + 9 = 11 → keep as is (Master Number)
Month: 1 + 1 = 2
Year: 1 + 9 + 9 + 5 = 24 → 2 + 4 = 6
Total: 11 + 2 + 6 = 19 → 1 + 9 = 10 → 1 + 0 = 1

Important: If any component reduces to 11, 22, or 33, keep it intact — these are Master Numbers with heightened spiritual significance.

2. Expression Number

The Expression Number reveals your natural talents and abilities. It is calculated from every letter in your full birth name, including family name and middle name.

The key rule: Reduce each word separately first, then add the word totals together, then reduce one final time.

Example: Name: MINH

M(4) + I(9) + N(5) + H(8) = 26 → 2 + 6 = 8

For the full name NGUYEN VAN MINH:

NGUYEN: N(5)+G(7)+U(3)+Y(7)+E(5)+N(5) = 32 → 3+2 = 5
VAN: V(4)+A(1)+N(5) = 10 → 1+0 = 1
MINH: M(4)+I(9)+N(5)+H(8) = 26 → 2+6 = 8
Total: 5 + 1 + 8 = 14 → 1 + 4 = 5

3. Soul Urge Number

The Soul Urge Number reflects your deepest inner desires and motivations. It is calculated using only the vowels (A, E, I, O, U) in your full name. The letter Y is not a vowel in this system.

The same per-word reduction rule applies: reduce each word's vowels separately, then add, then final reduction.

4. Personality Number

The Personality Number reveals how others perceive you. It is calculated using only the consonants in your full name, including Y.

Apply the same per-word reduction process as the other name-based numbers.

Golden Rules of Calculation

Always reduce each word separately before adding — this produces different results from adding all letters first, then reducing.
Preserve Master Numbers (11, 22, 33) at every stage of reduction.
Use the full birth name for calculations, not nicknames or shortened versions.
For Vietnamese names, convert to unaccented Latin characters (e.g., Nguyễn → NGUYEN) before applying the Pythagorean chart.

Conclusion

Mastering the correct calculation methods is the first step toward truly understanding numerology. At MiKiName, all calculations are performed automatically using the Pythagorean system with precise algorithms, so you can focus on what matters most — choosing the perfect name for your child.