The two tables
Pythagorean assigns 1–9 to the alphabet in order, then starts over. It is the system used by every calculator on this site and by most Western numerologists.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|
| A J S | B K T | C L U | D M V | E N W | F O X | G P Y | H Q Z | I R |
Chaldean assigns values by the sound and vibration traditionally attached to each letter, and famously stops at 8 — the number 9 is reserved and never assigned to a letter, being treated as sacred.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|
| A I J Q Y | B K R | C G L S | D M T | E H N X | U V W | O Z | F P |
Note that 9 appears in Chaldean results — it simply arrives as a total, never from a letter.
One name, both systems
We will use MARIA LOPEZ, a name with letters that land very differently in the two tables.
M(4) A(1) R(9) I(9) A(1) = 24 · L(3) O(6) P(7) E(5) Z(8) = 29
24 + 29 = 53 → 5 + 3 = 8
M(4) A(1) R(2) I(1) A(1) = 9 · L(3) O(7) P(8) E(5) Z(7) = 30
9 + 30 = 39 → 3 + 9 = 12 → 1 + 2 = 3
Eight versus three. Not a rounding difference — two different readings of the same person. This is normal, and it is why mixing the systems produces nonsense.
Where the systems really differ
| Pythagorean | Chaldean | |
|---|---|---|
| Assignment basis | Alphabetical position | Traditional sound/vibration |
| Value range | 1–9 | 1–8 (9 reserved) |
| Which name is used | Full name on the birth certificate | The name you are actually known by |
| Compound numbers | Reduced to a single digit | Two-digit total carries its own meaning before reduction |
| Master numbers | 11, 22, 33 preserved | Generally not used in the same way |
| Ease of learning | Memorise one ordered row | Memorise an unordered table |
The name question is the largest practical difference and is usually skipped. Pythagorean numerology treats the birth certificate name as the true chart because it was the name given at the moment of arrival. Chaldean treats the name in daily use as the live one, on the reasoning that a name is a vibration only when it is spoken — so a nickname, a stage name, or a married name genuinely changes the reading.
The compound-number point
Chaldean practice pays close attention to the two-digit total before reduction. A Chaldean 39 is read as its own thing, not merely as a 3. Pythagorean practice mostly discards the intermediate total except when it is a master number. If you like the idea that 16 and 25 both reduce to 7 but should not mean the same thing, Chaldean is closer to your instinct — Pythagorean handles that same intuition through karmic debt numbers instead, which we cover in a separate guide.
Which should you use?
Our answer: pick one and stay in it. If that sounds like a dodge, it is not — the single most common mistake we see is a reader taking a Life Path from a Pythagorean calculator and a Destiny number from a Chaldean one, then trying to interpret the relationship between them. Those two numbers were produced by systems that disagree about what letters are, and the relationship between them is not meaningful.
Beyond that, the practical considerations:
- Choose Pythagorean if you want your name reading to sit alongside a Life Path number, if you want master numbers in the picture, or if you want to be able to compare notes with almost any English-language numerology resource. It is the default for a reason: consistency and availability.
- Choose Chaldean if you are specifically interested in name work — name changes, business names, stage names — where the "name actually in use" principle does real work, and if compound-number readings appeal to you.
This site is Pythagorean throughout. That is a deliberate choice rather than a claim of superiority, and every calculator here states the method it uses. If you want to work in Chaldean, the table above is accurate and you can do it by hand in a few minutes — just do not blend the results.
To see the Pythagorean version of your own name, the Destiny calculator handles the full name and the Karmic Lessons calculator shows which values your name is missing entirely.