Core numbers

Compound number in numerology

A compound number is the two-digit total of a name or number, before it is reduced to one digit. Chaldean compound tables cover the totals from 10 to 52. John Doe's Chaldean name adds up to 34, so 34 is his compound number and 7 his single number. A total below 10 has none.

Updated Oct 28, 2026

More terms in Core numbers

Compound number: how the API works it out

The API returns the compound number in the compound field wherever it adds up letters or digits. It starts from the full total. If the total is from 10 to 52, that total is the compound number.

If it is larger, the API adds its digits until it is 52 or less. A total below 10 has no compound number, and the field is null. That can also happen when a large total folds down to a single digit.

John Doe's Chaldean name adds up to 34, so his compound number is 34 and his single number is 7. The mobile number 212 555 0147 adds up to 32. So its compound number is 32 and its single number is 5.

POST /v1/name returns it for each spelling, and POST /v1/profile returns it under name_number. POST /v1/number returns it for a mobile, vehicle or house number or a business name. POST /v1/numbers and POST /v1/business carry it inside each check.

The API does not read compound numbers yet. It returns the value with no reading text, and the profile says so in not_included.compound_meanings. Every fit and every reading comes from the single digit instead.

So show the compound number as a plain fact, and do not label it good or bad in your app.

Get it from the API

Name checker. Here is the call to the Numerology API from API for Astrology (apiforastrology.com) for our sample, John Doe, born Aug 15, 1990, with two other spellings.

POST /v1/name

# John Doe, born Aug 15, 1990, with two other spellings
curl -X POST "https://apiforastrology.com/api/numerology/v1/name" \
  -H "Authorization: Bearer $ASTROLOGY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"name":"John Doe","birth_date":"1990-08-15","variants":["Jon Doe","John Dow"]}'

Answer (long lists shortened)200 OK

{
  "person": {
    "birth_date": "1990-08-15",
    "mulank": 6,
    "bhagyank": 6
  },
  "system": "chaldean",
  "about": "A name is read from its letters.",
  "spellings": [
    {
      "name": "John Doe",
      "chaldean": {
        "total": 34,
        "compound": 34,
        "number": 7,
        "master": false,
        "words": [
          {
            "word": "John",
            "total": 18,
            "number": 9
          },
          {
            "word": "Doe",
            "total": 16,
            "number": 7
          }
        ]
      },
      "pythagorean": {
        "total": 35,
        "number": 8,
        "master": false
      },
      "planet": "Ketu",
      "planet_name": "Ketu",
      "fit": {
        "number": 7,
        "links": [
          {
            "from": "mulank",
            "from_number": 6,
            "to_number": 7,
            "relation": "neutral",
            "via": [
              "Ketu"
            ],
            "from_name": "mulank",
            "relation_name": "neutral"
          },
          {
            "from": "bhagyank",
            "from_number": 6,
            "to_number": 7,
            "relation": "neutral",
            "via": [
              "Ketu"
            ],
            "from_name": "bhagyank",
            "relation_name": "neutral"
          }
        ],
        "outcome": "neutral",
        "outcome_name": "Neutral",
        "reading": "This number is neutral to your own numbers. It neither helps nor gets in the way much."
      }
    },
    {
      "name": "Jon Doe",
      "chaldean": {
        "total": 29,
        "compound": 29,
        "number": 2,
        "master": true,
        "words": [
          {
            "word": "Jon",
            "total": 13,
            "number": 4
          },
          {
            "word": "Doe",
            "total": 16,
            "number": 7
          }
        ]
      },
      "pythagorean": {
        "total": 27,
        "number": 9,
        "master": false
      },
      "planet": "Moon",
      "planet_name": "Moon",
      "fit": {
        "number": 2,
        "links": [
          {
            "from": "mulank",
            "from_number": 6,
            "to_number": 2,
            "relation": "enemy",
            "via": [],
            "from_name": "mulank",
            "relation_name": "unfriendly"
          },
          {
            "from": "bhagyank",
            "from_number": 6,
            "to_number": 2,
            "relation": "enemy",
            "via": [],
            "from_name": "bhagyank",
            "relation_name": "unfriendly"
          }
        ],
        "outcome": "difficult",
        "outcome_name": "Not a good fit",
        "reading": "This number does not get along with your own numbers. It may get in your way more than it helps."
      }
    }
  ],
  "ranked": false,
  "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/name	Name checker
POST	/v1/number	Mobile, vehicle, house or business number
POST	/v1/profile	Core numbers and Lo Shu grid

Feature page: Name checker. 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.

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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.

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