Chaldean numerology calculator
John comes out as 9 in Chaldean numerology: J is 1, O is 7, H and N are 5, a total of 18, and 1 plus 8 makes 9. Enter a name or brand to see each letter's value, the compound total and the final digit. Free in your browser.
- Free
- Runs in your browser
- No sign-up
- Your data stays on your device
Run — free
Worked example
- Name
- John
- Letters
- JOHN
- Letter count
- 4
- Compound
- 18
- Number
- 9
Chaldean numerology assigns every Latin letter a fixed value from one through eight and never uses nine for a letter, reflecting an older Near Eastern chart still used for personal and brand name readings. This Chaldean numerology calculator accepts a name, ignores spaces and punctuation, totals the letter values into a compound sum, then reduces that sum by repeated digit addition until a single digit remains. You receive the cleaned letter string, the compound total, the reduced number, and a full per-letter breakdown so you can audit every step against any textbook chart.
What the Chaldean chart is and how reduction works
Classical Chaldean numerology maps the twenty-six Latin letters onto the integers one through eight according to a fixed table that deliberately leaves nine unused for any single letter. In the usual English presentation A, I, J, Q, and Y equal one; B, K, and R equal two; C, G, L, and S equal three; D, M, and T equal four; E, H, N, and X equal five; U, V, and W equal six; O and Z equal seven; and F and P equal eight.
To obtain a name number you convert every alphabetic character, sum those values into a compound total, then reduce by adding the digits of that total until only one digit from one through nine remains. Unlike Pythagorean systems that assign sequential one-through-nine values by alphabet order, the Chaldean chart is not a simple modular position code and cannot be recovered by taking character codes modulo nine.
This calculator applies only the Chaldean letter map and the digit-sum reduction; it does not compute life-path numbers from birth dates, does not score vowel-only soul urges, and does not invent master-number exceptions that freeze eleven or twenty-two unreduced. When practitioners want those extras they layer them outside the pure letter reduction this landing provides.
Where a Chaldean name number is useful
Brand and product teams experiment with spelling variants when choosing a public name and want a deterministic oracle that scores every candidate against the same ancient chart without spreadsheet drift. Educators teaching comparative numerology systems use the breakdown array to show students how Chaldean differs from Pythagorean letter values on the same string. Backend services that power name-compatibility games, baby-name explorers, or membership badges precompute reduced numbers in batch and store only the integer result while regenerating the compound and breakdown on demand.
Treat the number as a traditional symbolic label, not as medical, financial, or legal advice, and always show the compound and breakdown when transparency matters to your users.
What you can do with it
Personal and brand name readings
Score given names, full legal names, or brand spellings with the classic Chaldean 1–8 chart and show both the compound sum and the reduced digit.
Comparative numerology lessons
Use the per-letter breakdown in classrooms to contrast Chaldean values against Pythagorean maps on the same string.
FAQ
How does the Chaldean numerology calculator work?
It maps each A–Z letter in the name to the classic Chaldean values 1–8, sums them into a compound total, then repeatedly adds digits until a single number from 1–9 remains.
Which letters equal which numbers?
No letter is valued at 9 in the Chaldean chart.
What if I send an empty name or only digits?
At least one A–Z letter is required; empty strings, whitespace-only input, and non-letter-only strings are rejected and not billed.
Does this compute a life-path number from a birth date?
Birth-date life-path and other date-based numbers belong to separate tools.
Why does no letter equal nine in Chaldean numerology?
The traditional Chaldean chart only gives letters the values one to eight. Nine can still be the final result once the total is reduced, as with John, whose letters add up to 18 and reduce to 9.
Related tools
For developers — API access
Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.
API endpoint
Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.
Call it from your stack
curl -X POST https://api.kit.forhosting.com/enc/numerology-chaldean \
-H "Authorization: Bearer $KIT_KEY" \
-H "Content-Type: application/json" \
-d '{"name":"John Smith"}'const res = await fetch("https://api.kit.forhosting.com/enc/numerology-chaldean", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.KIT_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"name": "John Smith"
})
});
const { task_id } = await res.json();import os, requests
res = requests.post(
"https://api.kit.forhosting.com/enc/numerology-chaldean",
headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
json={
"name": "John Smith"
},
)
task_id = res.json()["task_id"]<?php
$res = file_get_contents("https://api.kit.forhosting.com/enc/numerology-chaldean", false, stream_context_create([
"http" => [
"method" => "POST",
"header" => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
"content" => '{"name":"John Smith"}',
],
]));
$task = json_decode($res, true);body := bytes.NewBufferString(`{"name":"John Smith"}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/enc/numerology-chaldean", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)Example request
{
"name": "John Smith"
}Example response
{
"task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
"type": "enc.numerology_chaldean",
"status": "queued",
"_links": {
"result": "/tasks/tsk_…/result"
}
}The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.
Pricing
Published price — no tokens, no invented credits. A failed task is never charged.
Errors
| HTTP | Code | Meaning |
|---|---|---|
401 | unauthorized | Missing or invalid API key. |
402 | insufficient_balance | Your balance doesn't cover the task price. |
404 | unknown_type | That task type doesn't exist. |
429 | rate_limited | Too many requests. Use the webhook instead of polling. |
Technical notes
Empty input and strings with no A–Z letters fail with invalid_input instead of inventing a zero.
What the Chaldean chart is and how reduction works
The compound figure is often kept for interpretive notes because two different names can share a reduced digit while carrying distinct compound vibes, which is why this endpoint returns both compound and number. The formula field in every success payload restates the one-through-eight map in a single line so automated tests and documentation can quote the same contract the engine uses.
Input contract, response fields, and invalid cases
Letters may be upper or lower case; they are normalized to uppercase for the breakdown. Spaces, hyphens, apostrophes, digits, and other punctuation are skipped rather than scored, matching common name-reading practice where only alphabetic characters contribute. Example: John yields J equals one, O equals seven, H equals five, N equals five, compound eighteen, and reduced number nine. POST a JSON body with a required string field name holding the personal name, brand, or product label you want reduced. The field also accepts aliases text, input, value, s, full_name, and person so forms and SDK clients can reuse existing column names without renaming. After filtering, at least one A–Z letter must remain: a missing field, a non-string type, a blank or whitespace-only string, and a string made only of digits or symbols all fail with invalid_input and are not billed. On success the response includes name as the trimmed original string, letters as the concatenated uppercase letters that were counted, letter_count as how many letters contributed, compound as the unreduced sum of Chaldean values, number as the single-digit reduction of that sum, breakdown as an ordered array of letter and value pairs for every counted character, and formula as a short restatement of the chart and reduce rule. Pair the free browser run on this page with the priced API when you need the identical mathematical result inside an automated pipeline.
Where a Chaldean name number API earns its keep
On this page the work runs entirely in your browser; through the API each successful reduction costs $0.002, failed validation is not charged, and no personal data is retained after the response. That split—free interactive exploration and a priced, identical API—matches the rest of the KIT tier-A catalog and lets you move from a classroom demo to an automated pipeline without changing the reduced digit.
Integration use cases
Deterministic SEO widgets and CI fixtures
Power free browser tools and automated tests with a pure, network-free reduction that never drifts between environments.
Technical questions
What does the Chaldean numerology calculator cost?
The browser tool is free. API requests use prepaid KIT balance at $0.002 per successful call; invalid input is not billed.