New Numerology API

Western numbers

Birthday number in numerology

The birthday number is the day of the month a person was born, in Western numerology. It is read as one special gift a person carries. The day is added down to one digit, but master numbers stay. So the 15th gives 6, the 22nd stays 22 and the 29th gives 11.

Updated

More terms in Western numbers

© API for Astrology (apiforastrology.com). "Birthday number explained". All rights reserved. Not to be copied or reused.Birthday number: the day you were bornName (Pythagorean values)Birth date, Aug 15, 1990J1O6H8N5D4O6E51155081990The day of the month: 15156Birthday number6A special giftThe day is added down to one digit.

Birthday number: how the API works it out

The API takes the day of the month from the birth date and reduces it. To reduce means to add the digits until one digit is left. Master numbers stay as they are.

So the 15th gives 6, the 22nd stays 22, and the 29th gives 11. Days 13, 14, 16 and 19 are karmic debt numbers. When the birth day is one of them, the karmic_debt list names it.

John Doe was born on the 15th, so his birthday number is 6, with no karmic debt. POST /v1/western returns it under birthday. The day field holds the plain day, 15.

The number field holds the result with any master number kept, and digit holds it reduced to 1 to 9. The birthday number has no reading entries of its own. The API reads the general entry for the number under an about line for the birthday number.

For 6, that entry is about care, family, home and taking responsibility. The birthday number looks like the mulank (birth day number) on POST /v1/profile, since both start from the day. They differ in two ways.

The mulank always ends on one digit, so the 29th gives 2 there, not 11. The mulank is also read through its ruling planet, in the Indian way, while the birthday number has no planet.

Get it from the API

Western numbers. Here is the call to the Numerology API from API for Astrology (apiforastrology.com) for our sample, John Doe, born Aug 15, 1990.

POST /v1/western

# John Doe, born Aug 15, 1990
curl -X POST "https://apiforastrology.com/api/numerology/v1/western?as_of=2026-10-01" \
  -H "Authorization: Bearer $ASTROLOGY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"John Doe","birth_date":"1990-08-15"}'
Answer (long lists shortened)200 OK
{
  "input": {
    "name": "John Doe",
    "birth_date": "1990-08-15"
  },
  "system": "pythagorean",
  "about": "These are the Western numbers. They use the Pythagorean letter values, where A is 1, B is 2 and so on. The numbers 11, 22 and 33 are master numbers and are…",
  "basis": {
    "letters": "Pythagorean letter values (A=1 ... I=9, J=1 ...).",
    "masters": "11, 22 and 33 are kept; `digit` is the same number reduced to 1-9.",
    "life_path": "Month, day and year are reduced one by one, then added.",
    "name_numbers": "Each word is reduced, then the words are added.",
    "y": "Y counts as a vowel when neither letter beside it is a vowel.",
    "personal_year": "Counted on the calendar year, from January 1.",
    "pinnacles": "The first ends at age 36 minus the life path digit; each later one lasts nine years, and the fourth for life.",
    "life_cycles": "Month, day and year, each reduced (masters kept). The first cycle ends with the first pinnacle, the second 27 years later, and the third runs for life.",
    "karmic_debt": "Karmic debt is looked for in six numbers: life path, expression, soul urge, personality, maturity and birthday. Pinnacles, challenges and life cycles are not…"
  },
  "life_path": {
    "total": 15,
    "number": 6,
    "digit": 6,
    "karmic_debt": [],
    "parts": {
      "month": 8,
      "day": 6,
      "year": 1
    },
    "about": "Your life path number comes from your full birth date. It shows the main road your life tends to follow.",
    "reading": "Your road tends to center on caring for others. Family, home and community often matter most to you."
  },
  "expression": {
    "total": 8,
    "number": 8,
    "digit": 8,
    "karmic_debt": [],
    "words": [
      20,
      15
    ],
    "about": "Your expression number comes from every letter of your full name. It shows your natural talents.",
    "reading": "You have a natural gift for business, managing and handling money."
  },
  "soul_urge": {
    "total": 17,
    "number": 8,
    "digit": 8,
    "karmic_debt": [],
    "words": [
      6,
      11
    ],
    "about": "Your soul urge number comes from the vowels in your name. It shows what you want deep inside.",
    "reading": "Deep inside, you want success and to be respected for what you achieve."
  },
  "personality": {
    "total": 9,
    "number": 9,
    "digit": 9,
    "karmic_debt": [
      {
        "number": 14,
        "reading": "14 points to a lesson about balance. Too much of anything, from food to freedom, tends to cost you."
      }
    ],
    "words": [
      14,
      4
    ],
    "about": "Your personality number comes from the consonants in your name. It shows how people see you before they know you well.",
    "reading": "People tend to see you as open-hearted and generous."
  },
  "maturity": {
    "total": 14,
    "number": 5,
    "digit": 5,
    "karmic_debt": [
      {
        "number": 14,
        "reading": "14 points to a lesson about balance. Too much of anything, from food to freedom, tends to cost you."
      }
    ],
    "about": "Your maturity number adds your life path and expression numbers. It shows what tends to grow stronger after about age 35.",
    "reading": "After about age 35, you tend to want more freedom and change. New places, people and ideas often keep you growing."
  },
  "birthday": {
    "day": 15,
    "number": 6,
    "digit": 6,
    "karmic_debt": [],
    "about": "Your birthday number is the day of the month you were born. It shows one special gift you carry.",
    "reading": "You tend to have a special gift for caring for others. You may be good at looking after people and making any place feel like home."
  },
  "karmic_lessons": {
    "about": "Karmic lessons are the numbers from 1 to 9 that no letter of your name gives. They show skills you may need to build on purpose.",
    "numbers": [
      {
        "number": 2,
        "reading": "No letter gives 2. Patience and working closely with others may need practice."
      },
      {
        "number": 3,
        "reading": "No letter gives 3. Sharing your feelings and ideas out loud may need practice."
      }
    ]
  },
  "hidden_passion": {
    "numbers": [
      5,
      6
    ],
    "count": 2,
    "about": "Your hidden passion is the number that appears most often in the letters of your name. It shows a strong drive you may not talk about.",
    "readings": [
      "5 is about freedom, change, travel and trying new things.",
      "6 is about care, family, home and taking responsibility."
    ]
  },
  "balance": {
    "initials": "JD",
    "total": 5,
    "number": 5,
    "about": "Your balance number comes from the first letter of each part of your name. It shows how you tend to handle hard times.",
    "reading": "5 is about freedom, change, travel and trying new things."
  },
  "challenges": {
    "about": "Your four challenge numbers come from your birth date. Each shows something you may have to work at during part of your life.",
    "items": [
      {
        "id": "first",
        "number": 2,
        "name": "First challenge",
        "reading": "Not taking things too personally."
      },
      {
        "id": "second",
        "number": 5,
        "name": "Second challenge",
        "reading": "Handling freedom wisely and not rushing from one thing to the next."
      }
    ]
  },
  "pinnacles": {
    "about": "Your four pinnacles are long stretches of your life. Each one has its own number and its own focus.",
    "as_of": "2026-10-01",
    "items": [
      {
        "id": 1,
        "number": 5,
        "digit": 5,
        "from_age": 0,
        "to_age": 30,
        "from_year": 1990,
        "to_year": 2020,
        "current": false,
        "reading": "5 is about freedom, change, travel and trying new things."
      },
      {
        "id": 2,
        "number": 7,
        "digit": 7,
        "from_age": 31,
        "to_age": 39,
        "from_year": 2021,
        "to_year": 2029,
        "current": true,
        "reading": "7 is about study, thinking deeply and looking inward."
      }
    ]
  },
  "life_cycles": {
    "about": "Your life cycles are three long stages of your life: your early, middle and later years. Each stage has its own number and its own mood.",
    "as_of": "2026-10-01",
    "items": [
      {
        "id": "early",
        "number": 8,
        "digit": 8,
        "from_age": 0,
        "to_age": 30,
        "from_year": 1990,
        "to_year": 2020,
        "current": false,
        "name": "Early years",
        "reading": "8 is about ambition, money, managing people and real results."
      },
      {
        "id": "middle",
        "number": 6,
        "digit": 6,
        "from_age": 31,
        "to_age": 57,
        "from_year": 2021,
        "to_year": 2047,
        "current": true,
        "name": "Middle years",
        "reading": "6 is about care, family, home and taking responsibility."
      }
    ]
  },
  "personal": {
    "as_of": "2026-10-01",
    "year": {
      "number": 6,
      "about": "Your personal year number shows the theme of this year for you. It changes on January 1.",
      "reading": "A year for home, family and duties. People may lean on you.",
      "do": "Give time to your home and family. Help the people who lean on you, and plan what you can do for them. Fix or improve something at home. Spend time with your…",
      "avoid": "Avoid taking on every duty yourself. Try not to give advice or help where it is not wanted. Do not forget your own rest while you care for others. Avoid…"
    },
    "month": {
      "number": 7,
      "about": "Your personal month number shows the theme of this month for you.",
      "reading": "This month tends to favor rest, study and thinking things over. You may want more quiet time than usual. It is a good time to read, plan and look inward,…"
    },
    "day": {
      "number": 8,
      "about": "Your personal day number shows the theme of this day for you.",
      "reading": "Good for work, money and big decisions."
    }
  },
  "not_computed": [],
  "not_claimed_karmic": "Karmic debt and karmic lessons describe patterns to work on. They are not a claim about a past life.",
  "not_claimed": "Numbers describe tendencies, not fixed events. Use them as a guide, not a rule.",
  "localization": {
    "lang": "en",
    "detail": "standard",
    "fell_back_to_en": [],
    "fell_back_to_standard": []
  }
}

Where the API returns it

POST/v1/westernWestern numbers
POST/v1/reportNumerology report (HTML or JSON)

Feature page: Western numbers. The rules the API follows are on the conventions page.

Related terms

From the blog

Numerology API

Get these numbers from the API

Create a free test key and call any route on this page with the sample people. Or try a request in the API reference first.

Your first answer

John Doe, born Aug 15, 1990

POST /v1/profile200 OK
  • Mulank6Venus
  • Bhagyank6Destiny number
  • Name number7Ketu

Real API output. A free test key gets the same answer.

  1. 01

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  3. 03

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