Calculated, not approximated
Full Swiss-Ephemeris precision, IANA time zones with historical DST, and the 88-degree Design arc. The same engine that the API serves to production clients is the one that draws your chart on this page.
Human Design Core — Free Chart · BodyGraph API
Free Human Design Chart Calculator
& BodyGraph API
Enter your birth date, time, and place — get your complete Human Design chart in seconds. Type, Strategy, Authority, Profile, all 9 Centers, 64 Gates, 36 Channels, and your Incarnation Cross. No account required, no email gate, calculated with the same engine that powers our developer API.
A sample BodyGraph
Your BodyGraph is the visual core of a Human Design reading. The nine geometric shapes are your Centers, each one either defined (colored) or open (white). The lines between them are your Channels, and the numbered points along their edges are your Gates.
Below the graphic you will see your Type (Generator, Manifesting Generator, Projector, Manifestor, or Reflector), your Strategy, your Authority, your Profile (e.g. 1/3, 5/1), and the planetary activations that produced every gate.
Every value is computed from your exact birth moment using Swiss-Ephemeris-grade astronomy and the standard 88-degree solar-arc offset for the Design calculation.
Why Human Design Core
Free, with no email wall
The chart, the BodyGraph SVG, your Type, Strategy, Authority, Profile, Centers, Gates, Channels and Incarnation Cross are all unlocked instantly. We never trade your birth data for access.
Reads natively in 3 languages
English, Korean, and Japanese readings are first-class — not auto-translated. Every Gate, Center, and Authority description is written and reviewed in each language.
Built for builders too
The same calculation engine is available as a REST API with JSON responses, BodyGraph SVG output, and a free monthly tier — perfect for apps, research, and embedded readings.
Read your chart, piece by piece
01 What is Human Design? The beginner's overview — origin, mechanics, and why it works. 02 The 5 Types Generator, Manifesting Generator, Projector, Manifestor, Reflector. 03 Authority How your body — not your mind — makes correct decisions. 04 The 9 Centers Defined and open centers, and what each one actually does. 05 64 Gates The I Ching archetypes wired into your chart. 06 36 Channels The bridges that define your fixed energy patterns. 07 Profile (1/3, 5/1, …) Your conscious + unconscious life roles in 12 combinations. 08 How to read a chart A 10-minute walkthrough that ties everything together.
Frequently asked questions
Why does the calculator need my exact birth time?
Your Profile lines, Authority, and several Gate activations move with the minute. A birth time that is off by 15 minutes can change your Profile from 1/3 to 2/4, or shift your Solar Plexus from defined to undefined. If you do not know the exact minute, enter the closest hour and treat the chart as a working draft.
Is the chart really free, and what is the catch?
The BodyGraph, Type, Strategy, Authority, Profile, Definition, all 9 Centers, 64 Gates, 36 Channels, and Incarnation Cross are 100% free with no signup. Optional paid features include the full PDF reading and the developer API beyond the free monthly tier.
How accurate is the calculation engine?
Human Design Core uses Swiss Ephemeris-grade planetary data, the standard 88-degree Solar arc for the Design calculation, and IANA time zone resolution with historical DST tables. The same engine powers the public web app and the REST API, so the chart you see here matches every downstream output exactly.
Can I use this from my own product or research project?
Yes. The Human Design Core API exposes the BodyGraph, Type, Authority, Centers, Gates, Channels, Profile, and Incarnation Cross as JSON. The free tier covers 50 requests per month, and paid plans scale to production workloads. See /en/api for endpoints and examples.