Quick Answer: Chaldean numerology assigns numbers 1–8 to letters (there is no 9 in the original Chaldean system). Add the values for each letter in your name, then reduce to a single digit. The key difference from Pythagorean numerology: Chaldean assigns letters in a different order and does not include the number 9. For example: A=1, B=2, C=3, D=4, E=5, F=6, G=7, H=8, I=1, J=2, K=3, L=4, M=5, N=6, O=7, P=8, Q=1, R=2, S=3, T=4, U=5, V=6, W=7, X=8, Y=1, Z=2.
The Chaldean Numerology Chart
Unlike the Pythagorean system (which goes A=1 through Z=9), the Chaldean system uses numbers 1–8 only. The number 9 is considered sacred and reserved in Chaldean tradition:
| Letter | Chaldean Value | Letter | Chaldean Value | Letter | Chaldean Value |
|---|---|---|---|---|---|
| A | 1 | J | 2 | S | 3 |
| B | 2 | K | 3 | T | 4 |
| C | 3 | L | 4 | U | 5 |
| D | 4 | M | 5 | V | 6 |
| E | 5 | N | 6 | W | 7 |
| F | 6 | O | 7 | X | 8 |
| G | 7 | P | 8 | Y | 1 |
| H | 8 | Q | 1 | Z | 2 |
| I | 1 | R | 2 |
Notice that I, Q, and Y all equal 1 in Chaldean numerology. This is different from Pythagorean, where A=1, I=9, Q=8, Y=7.
How to Calculate Your Name Number (Chaldean)
Use the name you are known by — not a nickname or a married name unless that is your commonly used name. Some numerologists prefer to use the name on your birth certificate:
- Step 1: Write each letter of your chosen name
- Step 2: Write the Chaldean value for each letter from the chart above
- Step 3: Add all values together
- Step 4: Reduce to a single digit (1–8, keeping 11 if it appears as a first reduction)
Worked Example
Name: ALEX (your full birth name)
| Letter | A | L | E | X | Total |
|---|---|---|---|---|---|
| Chaldean Value | 1 | 4 | 5 | 8 | 18 |
18 → 1+8 = 9. Name number: 9.
Name: MAYA
| Letter | M | A | Y | A | Total |
|---|---|---|---|---|---|
| Chaldean Value | 5 | 1 | 1 | 1 | 8 |
8 → no reduction needed (already a single digit). Name number: 8.
Compound Numbers and Double-Digit Meanings
Some numerologists pay special attention to the compound number — the total before reduction. For example, if your name adds to 18, the compound number 18 is also considered, and then reduced to 9. The compound number is sometimes called the “compound vibration” or “compound number.”
| Compound Number | Key Themes |
|---|---|
| 10 | New beginnings, leadership (keep 10 or reduce to 1) |
| 11 | Intuition, illumination, spiritual insight (master number) |
| 12 | Expression, creativity through collaboration |
| 13 | Transformation, practical manifestation, karmic energy |
| 14 | Freedom, analysis, adaptability |
| 15 | Charm, responsibility, spiritual service |
| 16 | Inner work, introspection, karmic lesson |
| 17 | Completion, spiritual awakening, material success |
| 18 | Completion of a cycle, letting go, humanitarian themes |
| 19 | Achievement, completion, new leadership cycle |
| 22 | Master Builder: big vision + practical execution (master number) |
| 33 | Master Teacher: spiritual service, unconditional love (master number) |
Chaldean vs. Pythagorean Numerology
| Feature | Chaldean | Pythagorean |
|---|---|---|
| Origin | Ancient Babylon (oldest system) | Ancient Greece (Pythagoras) |
| Letter order | 1–8, no 9 in core chart | 1–9 repeating |
| A value | 1 | 1 |
| I value | 1 | 9 |
| Q value | 1 | 8 |
| Y value | 1 | 7 |
| Primary use | Name analysis, brand names | Full name, birth date, Life Path |
| Most common for | Vedic/Indian numerology traditions | Western numerology, most English-language content |
Both systems are used legitimately in different traditions. The Chaldean system is older and is often preferred for name analysis in Indian numerology (where it is sometimes called Vedic numerology or Cheirology). The Pythagorean system is more common in Western numerology and is typically used for Life Path calculations.
Name Privacy and Interpretation Limits
- Your name is yours — only use your own name or a name you have explicit permission to calculate for
- Nicknames vs. full name — use the name you commonly use, but be consistent. If you are unsure, use your birth certificate name as the primary
- Married or changed names — some numerologists prefer the original birth name. If you have changed your name legally and use it consistently, that is a valid choice
- Business names — Chaldean numerology is often used for business name analysis. The same rules apply
- No name is “bad” — if your name number does not feel resonant, remember that numerology is a symbolic reflection tool, not a judgment
Internal Links
- All Numerology Calculators
- Life Path Number Calculator
- Life Path Calculator Guide
- Pythagorean Numerology Calculator
- Soul Urge Number
Frequently Asked Questions
Chaldean numerology is one of the oldest numerology systems, originating in ancient Babylon. It assigns letters to numbers 1 through 8 (there is no 9 in the original Chaldean chart, as 9 was considered sacred). It is often used for name analysis and is the primary system in Indian numerology traditions. It differs from the more common Pythagorean system in both letter ordering and the range of numbers used.
The primary difference is the letter-to-number chart. In Chaldean, I=1, Q=1, Y=1. In Pythagorean, I=9, Q=8, Y=7. Chaldean uses numbers 1–8 only; Pythagorean uses 1–9. Chaldean is older (ancient Babylon) and commonly used for name analysis; Pythagorean (ancient Greece) is the standard for Life Path calculations in Western numerology.
Use the name you commonly use and identify with. Some numerologists prefer the birth certificate name. If you have changed your name legally and use it consistently, that is valid. Using a nickname you have used for years is also acceptable — just be consistent across calculations. Do not calculate someone’s name without their permission.
Many numerologists pay attention to the compound number (the total before the final reduction), as well as the single-digit result. For example, a name that sums to 29 produces a compound vibration of 29 and a reduced number of 2 (2+9). Both can be considered. Master numbers (11, 22, 33) at any reduction stage are typically kept.
Yes. Chaldean numerology is commonly used for business name, brand name, and product name analysis. The same calculation method applies. Business name numerology is popular in Indian numerology traditions and is one of the main uses of the Chaldean system alongside personal name analysis.
Sources
- Cheung, K. (2024). The Numerology Workbook. Weiser Books.
- Hartmann, S. (2023). Chaldean Numerology: Ancient Babylonian Number Wisdom. Inner Traditions.
- British School of Numerology — historical overview of numerology traditions
- Mystical Digits Editorial Standards
Disclaimer: Numerology is a symbolic reflection and entertainment tool, not a science. No empirical evidence supports claims that name numbers predict outcomes, determine destiny, or carry inherent personality traits in a verifiable way. Use numerology as a self-reflection prompt, not as a basis for professional decisions. Last reviewed: July 2026.
Alexios Papaioannou is the founder and lead editor of Mystical Digits. He oversees topic research, editorial review, and content updates across numerology, astrology, angel numbers, and spiritual guidance topics, with an emphasis on clear interpretation over exaggerated claims.