Our numerology methodology

Primary system: Pythagorean 3-cycle method

For all birth-date calculations — primarily the life path number — Numology uses the Pythagorean 3-cycle method, the most widely used approach in Western numerology and the method taught by Matthew Oliver Goodwin in Numerology: The Complete Guide (1981) and by Hans Decoz in Numerology: Key to Your Inner Self (1994). Goodwin is explicit on the point: always add the numbers after separately determining the number for the month, day, and year.

The 3-cycle method reduces the month, day, and year of birth separately before adding them together. This preserves master numbers (11, 22, 33) that would otherwise be reduced away if you simply added all digits at once.

Step-by-step: life path number example

For someone born on February 27, 1976:

1. Month: 2 → already a single digit → 2
2. Day: 27 → 2 + 7 = 9
3. Year: 1976 → 1 + 9 + 7 + 6 = 23 → 2 + 3 = 5
4. Sum: 2 + 9 + 5 = 16 → 1 + 6 = 7
5. Result: Life Path 7, shown with the chain 16 → 7 and the 16 flagged as karmic debt

How many life path numbers are there?

Twelve. The nine single digits 1 through 9, plus the three master numbers 11, 22, and 33. Some numerologists count only nine and treat 11, 22, and 33 as intensified forms of 2, 4, and 6. We report the master number whenever the 3-cycle sum lands on it, because the method above preserves it on purpose.

All twelve, with the theme each page covers in depth:

• Life Path 1 — the original self: leading, initiating, forging your own path
• Life Path 2 — the peacemaker: cooperation, harmony, building bridges
• Life Path 3 — creative self-expression: communicating and inspiring through joy
• Life Path 4 — the builder: lasting foundations, structure, discipline
• Life Path 5 — the freedom seeker: variety, travel, adapting to change
• Life Path 6 — the caregiver: nurturing, protecting, serving family and community
• Life Path 7 — the seeker: analysis, investigation, the unseen
• Life Path 8 — authority and material mastery: enterprises, institutions, legacies
• Life Path 9 — the humanitarian: serving something larger than yourself
• Life Path 11 — master number, intensified 2: intuition and illumination that can overwhelm
• Life Path 22 — master builder, intensified 4: large-scale creation, the rarest path but one
• Life Path 33 — master teacher, intensified 6: unconditional love through teaching and healing

Master numbers

Master numbers — 11, 22, and 33 — are never reduced further during any intermediate step. If a month, day, or year reduces to 11, 22, or 33, that value is carried forward as-is before the final addition.

Karmic debt numbers

The numbers 13, 14, 16, and 19 are karmic debt numbers in the tradition of Hans Decoz and Matthew Oliver Goodwin. We check the total that comes out of adding month, day, and year (the 16 in the example above) and every step of its reduction. If a karmic debt number appears there, the calculator highlights it in the chain (16 → 7) and labels it. A birthday on the 13th, 14th, 16th, or 19th is reduced on its own and is not flagged.

Name-based numbers: Pythagorean system

For the destiny and soul urge numbers the default system is Pythagorean. Letters A–Z are assigned values 1–9 in sequence:

• Destiny: all letters in your full birth name
• Soul Urge / Heart's desire: vowels only — A, E, I, O, U, and Y. We always count Y as a vowel; the step-by-step output lists exactly which letters were added

Chaldean system

The Chaldean system originates in ancient Babylon. Notably, the number 9 is considered sacred and is not assigned to any letter. Switch between systems using the toggle on the numerology calculator's name-based tabs.

Address numerology

The address number is calculated by extracting all digits from the street address, summing them, and reducing that total digit by digit until it is a single digit or one of 11, 22, or 33 — the same rule the angel number below follows. Only the numeric characters in the address are used — letters and symbols are ignored.

Angel number (birth-date method)

We calculate the angel number by formatting the birth date as MMDDYYYY, summing every individual digit, and reducing that total digit by digit. Unlike the life path calculation, which reduces month, day, and year separately, this adds all eight digits in a single pass. Master numbers are preserved here as well: if the reduction lands on 11, 22, or 33, it stops there; otherwise the result is a single digit between 1 and 9.

This is distinct from repeating number sequences such as 111, 222, 333, 444, 555, 666, 777, 888, 999, 1111, and similar patterns. Those sequences are noticed in everyday life — on clocks, receipts, or number plates — and are interpreted as synchronistic messages. The birth-date angel number is a fixed value derived once from your date of birth. The two traditions share the name "angel numbers" but use entirely different methods and contexts.

Moon phase

The moon phase is calculated astronomically using the SunCalc library, which models the synodic lunar cycle (≈ 29.53 days) using standard celestial mechanics. For any given date, SunCalc returns the moon's illumination fraction (0–1) and its phase value within the cycle (0 = new moon → 0.25 = first quarter → 0.5 = full moon → 0.75 = last quarter → 1 = new moon again). This value maps to one of eight named phases: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent. Calculations use noon UTC on the target date to avoid day-boundary edge cases. No external APIs are used — everything runs in your browser.

Moon match compatibility compares the circular phase distance between two birth moons. A score of 100% means identical phases; 0% means exact opposites (new vs. full). In the reading, identical phases suggest a shared instinctive rhythm, while opposite phases suggest a complementary pairing in which each partner supplies what the other lacks.

Personal year, month, and day

Personal year uses the same arithmetic as the life path, with the calendar year in place of your birth year: reduce your birth month, birth day, and the year you are asking about separately, add the three, and reduce the total. Someone born February 27 asking about 2026 gets 2 + 9 + 1 (from 2026 → 10 → 1) = 12 → personal year 3. Master numbers are kept here as they are in the life path. Personal month adds the calendar month to the personal year and reduces again; personal day adds the calendar day to the personal month.

Compatibility

Compatibility scores look up the pair of life path numbers in a fixed table of the nine single digits. Each pair has a score from 40 to 85 and a rating (harmonious, good, neutral, or challenging); the table is symmetric, so 3 with 5 scores the same as 5 with 3. Master numbers are folded to their base digit for this lookup only — 11 as 2, 22 as 4, 33 as 6 — because the table is built on single digits. The scores reflect harmonic and tension relationships described in numerological literature, not predictions of relationship outcomes.

A note on variation across traditions

Numerology has no single canonical authority. Our choices align with the most widely adopted conventions among contemporary Western practitioners. If you notice a discrepancy, it is likely due to system differences (Pythagorean vs. Chaldean), master number handling, or Y-as-vowel treatment — all documented in the step-by-step calculation output.

Two respected books use different birth-date arithmetic from ours. David A. Phillips' Ruling Number adds every digit of the birth date in a single pass (his example: 1/3/1960 → 1 + 3 + 1 + 9 + 6 + 0 = 20 → 2). Faith Javane and Dusty Bunker's Life Lesson Number adds the month, day, and year as whole numbers before reducing (for example, 4 + 12 + 1968 = 1984 → 22/4). All three routes usually land on the same final digit, but the intermediate total can differ, which is where a master number or a karmic debt label appears in one method and not another.