Chaldean numerology is a name-and-birth-date system in which each letter carries a value from 1 to 8 (never 9), the values are added into a compound number, and that compound is reduced to a single digit from 1 to 9. It differs from the better-known Pythagorean system in two ways: its letter chart is based on sound vibration rather than alphabetical order, and it treats 9 as a sacred number that no letter may take. It is a symbolic tradition, not a scientific measurement, so use it as a reflective lens rather than a verdict on your life.
This guide gives you the full Chaldean letter chart, a step-by-step method with worked examples, a side-by-side comparison with Pythagorean, and an honest note on how Indian numerologists use it next to the Mulank and Bhagyank taken from your birth date. If you only want the number, the free [Namank calculator](/namank) does the sum for you.
What is Chaldean numerology?
Chaldean numerology is generally described as the older of the two major Western-facing systems, with traditional roots in ancient Babylon (Chaldea). In the modern era it was popularised by the palmist and numerologist Cheiro, whose early twentieth-century books are the usual reference point. How much of the chart is truly ancient and how much was codified later is debated, so treat the Babylonian origin as the tradition's own account rather than settled history.
What sets it apart is its logic. The letters are grouped by sound, so letters that sound alike share a value, and the number 9 is left out of the chart entirely because it is regarded as holy, a number that can arise only as a total. In India it is the system most numerologists apply to names, because it pairs naturally with the nine-planet scheme of Vedic astrology.
What is the Chaldean letter chart?
Every English letter maps to a number from 1 to 8. This is the same chart used by the [name number tool on Daanyam](/namank):
| Value | Letters | Ruling graha (Vedic-leaning pairing) |
|---|---|---|
| 1 | A, I, J, Q, Y | Sun (Surya) |
| 2 | B, K, R | Moon (Chandra) |
| 3 | C, G, L, S | Jupiter (Guru) |
| 4 | D, M, T | Rahu |
| 5 | E, H, N, X | Mercury (Budh) |
| 6 | U, V, W | Venus (Shukra) |
| 7 | O, Z | Ketu |
| 8 | F, P | Saturn (Shani) |
What is the difference between Chaldean and Pythagorean numerology?
| Feature | Chaldean | Pythagorean |
|---|---|---|
| Letter values | 1 to 8, grouped by sound | 1 to 9, assigned in alphabetical order (A=1 ... I=9, then repeat) |
| Role of 9 | Sacred; no letter carries it | Ordinary; I and R carry it |
| Compound numbers | Central; the pre-reduction total (commonly read from 10 to 52) is read as well | Usually ignored; only the final digit is read |
| Typical use | Names, brand names, name changes | Life path from birth date, general Western practice |
| Common in India | Yes; the usual choice for Namank | Used as a second opinion |
| Origin story | Traditionally Babylonian | Attributed to the Greek philosopher Pythagoras by tradition |
Neither system is proven, and neither is 'the correct one'. Practitioners choose by lineage and habit. A practical approach is to run both and note where they agree. If you want the Pythagorean side in more depth, our guide to [name numerology](/blog/name-numerology-how-your-name-number-shapes-your-life) walks through both charts together.
Which name should you use for the calculation?
- Birth name: the name on your birth record, read in traditional practice as your original vibration.
- Daily name: the name people actually call you and that you sign with. Many Indian numerologists consider this the one that shapes your public life.
- Spelling: Hindi and regional names have several romanised forms (Vijay or Vijaya, Laxmi or Lakshmi). Each spelling can yield a different number, so decide on the spelling you really use on documents.
Changing letters just to hit a 'lucky' number is a decision to approach carefully. It affects signatures, documents and how people address you, and it is best treated as a long-term personal choice rather than a quick fix.
How does your Chaldean name number relate to Mulank and Bhagyank?
Indian numerology reads three numbers together. Your [Mulank](/mulank) is the day of your birth reduced to one digit, your [Bhagyank](/bhagyank) is the full birth date reduced, and your Namank comes from the name. The first two are fixed at birth; the name number is the one that is a matter of spelling and usage.
- Mulank describes your core temperament and is the number most people quote. Read more in [what is Mulank](/blog/what-is-mulank).
- Bhagyank describes the broader path and fortunes associated with the birth date.
- Namank (Chaldean) describes how your name presents you. Look for harmony or friction with the other two, rather than a single winner.
When the planets of your Mulank and Namank are friendly, practitioners read the combination as supportive; when they clash, they suggest awareness rather than alarm. For per-number guidance, see the [Mulank remedies by birth number](/blog/mulank-remedies-upay-by-birth-number) and the profile of [Mulank 5](/blog/mulank-5-numerology-personality-career-love-remedies).
What does each Chaldean single number mean?
| Number | Planet |
|---|