Human Design Chart Calculator

What is a Human Design chart, and what is it not?

A Human Design chart (also called a bodygraph) is a diagram of the sky at the moment of birth. It is drawn as nine centers joined by channels. This calculator draws the chart and also lists each center, channel, gate and line in words, so the picture is not the only place a fact stands.

The calculation is astronomy and arithmetic: where the Sun, Moon and planets stood, and which gate and line of a fixed wheel each one falls in. What a result is read to mean comes from the tradition of Human Design, not from measurement. The chart is not a medical or financial tool, and it does not predict events. It is meant for reflection and entertainment.

How do the two sides and the 88 degrees work?

A chart has two sides, Personality and Design, and each side is the sky at one moment. Personality is the moment of birth. Design is the earlier moment when the Sun stood 88 degrees of arc before its place at birth, about three months earlier. At each moment the Sun, Earth, Moon, both lunar nodes and the eight planets from Mercury to Pluto give one activation each, 13 a side and 26 in all.

The Earth is placed opposite the Sun and the south node opposite the north node, so the sky supplies 11 positions a side and the other two follow. Every activation falls in one gate and one line of the wheel.

What are gates, lines, channels and centers?

The zodiac is cut into 64 gates of 5.625 degrees each, and every gate into six lines of 0.9375 degrees, which makes 384 lines. A gate and a line are the address of a degree on that wheel. Each gate belongs to one of nine centers: Head, Ajna, Throat, G Center, Heart, Sacral, Solar Plexus, Spleen and Root.

A channel joins a gate in one center to a gate in another, and there are 36 of them. It is defined when both of its gates are active, on either side. A center is defined when a defined channel reaches it, and open otherwise. If a gate is active without its partner, it is a hanging gate and defines nothing. The definition says how many separate groups the defined centers form: single, split, triple split or quadruple split, or none.

How are type, strategy and authority read from a chart?

A chart is read in a fixed order: the type first, then the strategy that goes with it, then the authority. The type follows from which centers are defined and how they connect. The five types are Generator, Manifesting Generator, Projector, Manifestor and Reflector.

Each type has a strategy in the tradition, a short phrase such as to respond or to wait for an invitation. The authority is the center the tradition names for decisions, found by testing a fixed list of centers in order. There are seven: Emotional, Sacral, Splenic, Ego, Self-Projected, Mental and Lunar. A strategy is an idea of the tradition, not an instruction.

What are the profile and the incarnation cross?

The profile is a pair of numbers, written 5/1 in text, taken from the line of the Sun on the Personality side and the line of the Sun on the Design side. Twelve pairs occur, from 1/3 to 6/3.

The incarnation cross is named for four gates: the Sun and the Earth on the Personality side, and the Sun and the Earth on the Design side. Its angle, Right Angle, Juxtaposition or Left Angle, follows from the profile. The result lists the four gates and the angle, and says how common that angle was in a seeded sample of birth moments.

Why does the birth time matter, and what does the day view show?

The birth time matters because the sky keeps moving. The Sun crosses about one line in a day and the Moon about two gates. A chart therefore changes within a single day, and a few minutes can carry a gate or a line over an edge. Birth times are often rounded, so the result names the minute at which the type, authority, profile, definition or cross would change, within 15 minutes either way.

With no birth time the calculator does not choose one. It shows the day. A value that holds all day is shown as it is, and a value that changes is listed with the local times it holds. The chart draws what holds only part of the day hatched or dashed. The table of gates and lines is a sample for noon and is labeled so.

Which node and time zone conventions does the calculator use?

The calculator uses the true node for the lunar nodes, which is a convention of the system. Some calculators use the mean node instead, and the two can differ by up to about 1.5 degrees, enough to give another gate or line.

A birth record gives a local clock time, and the chart needs UTC. The calculator reads the offset from the time zone records for the place and date, prints the conversion above the button and marks an offset typed by hand as typed. Clock rules before 1970 are only partly recorded, so the form warns when the offset may be off. Charts are calculated for births from April 6, 1800 to December 31, 2100.

Does the calculator send the birth data to a server?

The birth data is not sent to a server, because the calculation runs in this browser. Choosing a country downloads that country's place list, so the host can see which country was requested. A browser's network panel can confirm that no request carries what was typed. The tab keeps the inputs so that a reload finds them, and Start over clears them. AstroJane sets no cookie, and the address of the page stays the same.