:::note
**TL;DR**
- A Human Design bodygraph is a chart of nine energy centers, 64 gates, and 36 channels, calculated from two moments: your birth and a point 88 degrees of solar arc before it.
- Defined centers are colored in and reliable; open centers are white and conditioned by others. A channel connects and defines two centers when both its gates are active.
- The bodygraph derives your Type, Strategy, Inner Authority, Profile, Definition, and Incarnation Cross, all from planetary longitudes mapped onto the 64 I Ching hexagrams.
- Generate a full bodygraph in one call with the Human Design API, type, authority, profile, centers, channels, and gates in a single typed response.
:::

A Human Design bodygraph chart is the visual map at the center of the Human Design system, a synthesis of astrology, the I Ching, the Kabbalah, the Hindu-Brahman chakra model, and modern physics. It looks like a body-shaped diagram with nine geometric shapes wired together by lines. Each shape is an energy center, each line is a potential channel, and each numbered point is a gate tied to one of the 64 I Ching hexagrams. The chart is built from your birth date, time, and place, and from a second calculation taken before birth. This guide explains how a bodygraph is constructed and how each layer is read, with precise terminology and a developer path to generating charts programmatically.

## What is a Human Design bodygraph chart?

A Human Design bodygraph is a body-shaped diagram of nine energy centers connected by 36 channels, with 64 gates positioned where the channels meet the centers. It is generated from two data sets: the Personality, calculated at the exact moment of birth, and the Design, calculated 88 degrees of solar arc earlier. Planetary positions at both moments are mapped onto the 64 I Ching hexagrams to activate specific gates. Where two connected gates are both active, a channel forms and the two centers it joins become defined. The pattern of defined and open centers produces the Type, Strategy, Inner Authority, Profile, Definition, and Incarnation Cross. The bodygraph is the primary tool of Human Design analysis, sometimes called the chart, and it is unique to each birth moment down to the minute.

Ready to build this? [Human Design API](/products/human-design-api "production-ready Human Design API for bodygraph, type, authority, and profile") returns the full chart in one call. [See pricing](/pricing "RoxyAPI pricing and plan tiers").

## How are the nine centers categorized and read?

The nine centers are energy hubs, each colored in when defined and white when open. They group into four functional categories. The two pressure centers are the Head, which applies mental pressure to think, and the Root, which applies adrenaline pressure to act. The three awareness centers are the Ajna for conceptualization, the Spleen for instinct and survival, and the Solar Plexus for emotional awareness. The four motor centers that supply energy are the Heart, the Sacral, the Root, and the Solar Plexus. The Throat governs manifestation and communication, and the G Center is the seat of identity, love, and direction. A defined center is consistent and reliable, a fixed trait you can trust. An open center is conditioned by others and the environment, where you take in and amplify energy that is not consistently your own.

| Center | Category | Function |
|---|---|---|
| Head | Pressure | Inspiration, mental pressure |
| Ajna | Awareness | Conceptualization, mind |
| Throat | Manifestation | Communication, action |
| G Center | Identity | Identity, love, direction |
| Heart (Ego) | Motor | Willpower, self-worth |
| Sacral | Motor | Life force, work, fertility |
| Solar Plexus | Motor and Awareness | Emotions, emotional waves |
| Spleen | Awareness | Instinct, immunity, fear |
| Root | Pressure and Motor | Adrenaline, drive, stress |

## How do the 64 gates connect to the I Ching hexagrams?

The 64 gates of the bodygraph are a direct one-to-one mapping of the 64 hexagrams of the I Ching. Gate 1 corresponds to hexagram 1, gate 51 to hexagram 51, and so on through all 64. Each gate carries a keynote name describing its bodygraph function, and each is divided into six lines that match the six lines of the hexagram. The 360 degrees of the ecliptic are divided into 64 gates, so every planetary longitude in the chart falls inside exactly one gate and one of its six lines. The line a planet lands in carries its own keynote and, for the Sun positions, sets the Profile. This is why the bodygraph is described as the I Ching projected onto a human form: the gate gives the theme and the line refines it.

Real activation from a bodygraph generated through the Human Design API:

:::stat
**Gate 25, Line 5** maps to I Ching hexagram 25, Innocence, with the keynote The Spirit of the Self. Verified from a live `/human-design/bodygraph` response.
:::

For the full hexagram reference behind the gates, see the [complete guide to the 64 hexagrams](/blogs/64-hexagrams-meaning-complete-guide "the 64 I Ching hexagrams and their meanings explained").

## How does a channel define two centers?

A channel is a connection between two specific gates that sit in two different centers. There are 36 channels in total. A channel becomes defined only when both of its gates are activated, by a planet at birth on the Personality side or 88 degrees earlier on the Design side. When a channel is defined, the two centers it links are both colored in and become defined centers. This is the mechanic that turns scattered gate activations into structured definition. For example, the Channel of Awakening joins gate 20 in the Throat to gate 10 in the G Center, defining both. Channels belong to three circuit families: Individual, which carries mutation and empowerment, Collective, which carries sharing through logic or experience, and Tribal, which carries support and the bonds of community. A single active gate without its partner is an activation but does not define a center on its own.

## What are the Personality and Design data sets?

A bodygraph is built from two separate calculations rendered in two colors. The Personality, drawn in black on the right of the chart, uses planetary positions at the exact moment of birth and represents the conscious self, who you think you are. The Design, drawn in red on the left, uses planetary positions from 88 degrees of solar arc before birth, roughly 88 days or about three months earlier, and represents the unconscious, bodily self that others often notice before you do. Each side records 13 activations across the Sun, Earth, Moon, North and South Nodes, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, for 26 in total. The 88-degree figure is measured in degrees of solar movement, not calendar days, so the exact gap shifts slightly with the orbital speed of the Earth. Together the black and red activations imprint the complete chart.

| Data set | Color | Moment | Represents |
|---|---|---|---|
| Personality | Black | Exact birth | Conscious mind, who you think you are |
| Design | Red | 88 degrees of solar arc before birth | Unconscious body, what others see |

## How are Type, Authority, Profile, and Cross derived?

The defined centers and channels combine into the highest-level features a reader uses. Type comes from which motor centers are defined and how they connect to the Throat. There are five Types: Manifestor (initiate, Strategy to inform), Generator and Manifesting Generator (respond, Strategy to wait to respond), Projector (guide, Strategy to wait for the invitation), and Reflector (sample, Strategy to wait a lunar cycle of about 28 days). Inner Authority is the body-based decision mechanism, read in a fixed priority: Emotional if the Solar Plexus is defined, then Sacral, Splenic, Ego, Self-Projected, then Mental and Lunar for the unfixed. The Profile is two numbers, the conscious Personality Sun line over the unconscious Design Sun line, drawn from the six hexagram lines (1 Investigator, 2 Hermit, 3 Martyr, 4 Opportunist, 5 Heretic, 6 Role Model). The Incarnation Cross is built from the four cardinal gates, the Personality Sun and Earth and the Design Sun and Earth, plus an angle of Right Angle, Juxtaposition, or Left Angle.

## How do developers generate a bodygraph with an API?

Generating a bodygraph by hand means computing planetary longitudes for two moments, mapping each onto the 64 gates and six lines, resolving channels, deriving Type and Authority, and naming the cross. The Human Design API does all of it in one POST call. Send a birth date, time, and timezone, and it returns the Type, Strategy, Inner Authority, signature, not-self theme, Profile, Definition, Incarnation Cross, all nine centers with their defined state and active gates, the defined channels, and all 26 activations across the Personality and Design sides. Positions are produced by Roxy Ephemeris and verified against NASA JPL Horizons, so the gate and line boundaries match the references practitioners cross-check against. Latitude and longitude are optional because the bodygraph depends only on ecliptic longitudes.

:::tabs
::tab[curl]
```bash
curl -s -X POST https://roxyapi.com/api/v2/human-design/bodygraph \
  -H "Content-Type: application/json" \
  -H "X-API-Key: $ROXYAPI_KEY" \
  -d '{"date":"1988-03-22","time":"07:45:00","timezone":-5}'
```
::
::tab[TypeScript]
```typescript
import { createRoxy } from "@roxyapi/sdk";

const roxy = createRoxy(process.env.ROXYAPI_KEY!);

const { data, error } = await roxy.humanDesign.generateBodygraph({
  body: { date: "1988-03-22", time: "07:45:00", timezone: -5 },
});

if (data) {
  console.log(data.type, data.authority, data.profile);
}
```
::
::tab[Python]
```python
import os
import requests

resp = requests.post(
    "https://roxyapi.com/api/v2/human-design/bodygraph",
    headers={"X-API-Key": os.environ["ROXYAPI_KEY"]},
    json={"date": "1988-03-22", "time": "07:45:00", "timezone": -5},
)
data = resp.json()

print(data["type"], data["authority"], data["profile"])
```
::
:::

A real response for the call above returns a Manifestor with Ego authority, a 5/1 Profile, Single definition, defined Throat, G Center, and Heart, and the Left Angle Cross of Healing built from gates 25, 46, 58, and 52. Responses translate into eight languages with `?lang=` (en, tr, de, es, hi, pt, fr, ru), so `?lang=hi` returns the Type and Strategy in Hindi. The Human Design bodygraph endpoint is one of 148 endpoints across 12 insight domains, including Western astrology, Vedic astrology, numerology, and tarot, all under one key, with typed SDKs for TypeScript, Python, and PHP, drop-in UI components, and a Remote MCP server your AI agent can call directly. Browse the request and response schema in the [full API reference](/api-reference#tag/human-design/POST/human-design/bodygraph "complete Human Design bodygraph API request and response schema").

## FAQ

**What is the difference between defined and open centers in a bodygraph?**
A defined center is colored in and connected by a channel to another defined center. It is a consistent and reliable source of energy or awareness that you can trust. An open or undefined center is white and has no completed channel running through it, so it takes in and amplifies energy from others and the environment, making it the place where conditioning enters.

**Why is the Design calculated 88 degrees before birth?**
The Design side of the chart uses planetary positions from the moment the Sun was 88 degrees of solar arc earlier than the birth position, which works out to roughly 88 days or about three months before birth. Human Design ties this point to conception and to the imprint of the unconscious, bodily self. Because it is measured in degrees of solar movement and not calendar days, the exact time gap varies a little with the orbital speed of the Earth.

**How many types are there in Human Design?**
There are five Types: Manifestor, Generator, Manifesting Generator, Projector, and Reflector. Each has its own aura and a Strategy for engaging life: Manifestors inform before acting, Generators and Manifesting Generators wait to respond, Projectors wait for the invitation, and Reflectors wait a full lunar cycle of about 28 days. Generators including Manifesting Generators are the most common, and Reflectors, with all nine centers open, are the rarest at just over one percent.

**How is the Profile read in a bodygraph?**
The Profile is two numbers separated by a slash, such as 5/1 or 6/2. The first number is the line of your conscious Personality Sun and the second is the line of your unconscious Design Sun, each one of the six lines of the I Ching hexagram. The six lines carry the keynotes Investigator, Hermit, Martyr, Opportunist, Heretic, and Role Model, and the pairing describes the life role you are here to embody.

**Can I generate Human Design charts with an API?**
Yes. The Human Design API generates a complete bodygraph from a birth date, time, and timezone in a single POST request, returning Type, Strategy, Inner Authority, Profile, Definition, Incarnation Cross, all nine centers, the defined channels, and every gate activation. It is built for Human Design apps, readings, and coaching tools, with typed SDKs and a Remote MCP server for AI agents.

## Conclusion

A bodygraph is a precise, repeatable calculation: two planetary snapshots mapped onto the 64 I Ching hexagrams, resolved into defined centers and channels, and read out as Type, Authority, Profile, and Cross. Once you understand the layers, the chart stops looking like a mystery diagram and starts reading like a structured energy map. Generate accurate charts programmatically with the [Human Design API](/products/human-design-api "production-ready Human Design API with bodygraph, type, authority, and profile") and explore the full multi-domain platform on the [pricing page](/pricing "RoxyAPI plans and pricing").