What makes Synthesis different from other birth chart readings?

Synthesis is the only birth chart reading that interprets your chart across five distinct astrology systems at once: Tropical (Western, season-aligned), True Sidereal (real IAU constellation boundaries, 13 signs including Ophiuchus), Draconic (persistent motivational themes from your Moon's North Node), Chinese Zodiac (year, month, day, hour pillars with elements), and Numerology (Life Path number). Each system reveals different layers of your personality — your birth chart works like mixing paint — each system adds a color, and the signs that keep showing up across systems are the dominant ones. The ratio is what actually describes you.

What is the difference between Tropical and Sidereal astrology?

Tropical astrology aligns with the seasons (spring equinox = 0° Aries). True sidereal astrology aligns with the actual constellations. Due to precession, they've drifted apart — about 31° against the real constellation boundaries — so your sidereal placements are often one sign different from Tropical, and can even land in Ophiuchus. Synthesis shows both so you can see different layers of your personality.

What is Draconic astrology?

Draconic astrology uses your Moon's North Node as 0° Aries, revealing persistent motivational themes — the most fundamental patterns beneath your everyday personality. It often shows motivations and tendencies you've felt but couldn't name. Synthesis is one of the only calculators showing all five systems side by side.

What is numerology Life Path number?

Your Life Path number is derived from your birth date and represents your core life purpose and natural talents. Synthesis calculates your Life Path number (1-9, 11, 22, or 33) and integrates it with your astrological chart to reveal how your numerological vibration aligns with or complements your planetary placements — adding another layer of self-understanding.

Why combine multiple astrology systems?

Each system reveals different aspects of who you are. Tropical shows your personality in relation to Earth's seasons. Sidereal shows your connection to the cosmos and fixed stars. Draconic reveals persistent motivational themes. Chinese Zodiac adds cyclical timing and elemental balance. Numerology reveals your life path vibration. The synthesis of all five creates a richer, more dimensional view than any single system alone — like viewing a diamond from multiple angles to see where light refracts differently.

How accurate are the calculations?

Synthesis uses the Swiss Ephemeris, the same astronomical engine used by professional astrologers and researchers worldwide. Calculations are accurate to arc-seconds. For sidereal, we use true astronomical sidereal, aligned to the real IAU constellation boundaries.

What does the AI birth chart reading actually analyze?

The AI interprets your complete birth chart: planetary positions, house placements, aspects between planets, and patterns across all five systems (Tropical Astrology, Sidereal Astrology, Draconic Astrology, Chinese Zodiac, Numerology). The free chart includes your signs, houses, and a behavioral snapshot across all five systems. Subscribers get chat with an AI that knows your chart, plus 16 sign-based deep dives unlocked immediately, each isolating a specific signal in your chart.

What is included in the free birth chart reading?

Your birth chart explained with Sun, Moon, and Rising signs interpreted across five systems (Tropical, Sidereal, Draconic, Chinese Zodiac, Numerology), all 12 house placements, Chinese Zodiac animal and element for year/month/day/hour, Life Path number, a behavioral snapshot, and a shareable visual reading. No payment required.

What do subscribers get?

Subscribers get chat with an AI that knows your chart (25 messages a week, 100 on Pro), plus 16 sign-based deep dives — all unlocked immediately. Each module isolates a specific sign pattern in your chart, tracing evidence across all five systems. Modules cover dominant tone, emotional regulation, decision-making patterns, stress architecture, relationship dynamics, and more. Subscribers also get unlimited chart calculations. Synastry readings are a separate $28 purchase.

What does my birth chart mean?

Your birth chart is a map of where every planet was at the exact moment you were born. Each placement reveals something about how you think, feel, relate, and act. Synthesis interprets your birth chart across five systems — Tropical, Sidereal, Draconic, Chinese Zodiac, and Numerology — to explain what your chart means simply and insightfully. Where the systems agree, those patterns are strongest. Where they differ, that's where things get interesting.

Does this predict my future?

No. Synthesis is about self-understanding, not prediction. Your chart shows patterns in how you think, feel, and act — not what will happen to you. We don't do horoscopes, forecasts, or fortune-telling.

Five systems. A fuller picture of you.

More of you makes sense here.

Each system of astrology offers a different perspective. Synthesis brings astrology, BaZi and numerology together to show how the pieces connect—and help you use that understanding in relationships, work and everyday decisions.

Tropical · True sidereal · Draconic · BaZi · Numerology

No card. About 60 seconds.

Five systems, each with its own job

Tropical
The conscious, visible self, how you present.
True sidereal
The patterns underneath, the things you fall into without thinking.
What sets Synthesis apart: real constellation boundaries, with 13 signs including Ophiuchus, not the Lahiri convention most sites use.
Draconic
The motivations that keep coming back.
BaZi
How you behave under pressure.
Numerology
The structural rhythm of a life.

Together they're layers of one working model, and no layer is “the real you.”

How the numbers are made

Positions are computed from the Swiss Ephemeris to the arc second. True sidereal uses the real IAU constellation boundaries rather than equal 30 degree signs, which is why a placement can legitimately sit past 30 degrees in a wide constellation like Pisces, and why your sidereal signs will differ from a Lahiri calculator. BaZi pillars are set on true solar time for your birth longitude, not clock time, so the hour pillar is right. Every claim in a paid reading is checked against the chart's own math by 39 deterministic validators before it reaches you, and repaired if it disagrees.

Every one of those sentences is checkable, which is the point. If something looks wrong, reply and it gets fixed.

You already know the sun sign is not the whole story.

So you have been doing this the long way. Sidereal on one site, draconic on another, a BaZi calculator that finally asks for the hour, a numerology page that gives you the life path and stops.

Synthesis runs all five at once and shows you where they agree. Agreement across independent systems is the one thing you cannot get by opening more tabs, and it shows which patterns run deepest.

What repeats across the systems is what dominates your mix.

Example composition

Scorpio

19.6%

Libra

16.1%

Gemini

14.0%

Leo

12.6%

Pisces

9.0%

Leading colors

Scorpio+Libra

The engine scores every placement across all five systems and reports what repeats. A pattern that shows up in one system still counts. One that shows up in four runs deep, and your composition shows which colors lead your mix and by how much.

It reports what is missing too. A chart with nothing in earth behaves differently from one with earth everywhere, and most readings never mention the gap.

Your chart, answered live

Chat with Synthesis AI about your chart

Bring a question from your life. Synthesis connects the relevant parts of your chart, explains what each perspective adds, and helps you explore how to use that understanding.

Illustrative conversation

My tropical Sun is Scorpio but my sidereal Sun is Libra — what's each one actually measuring?

Both describe the Sun’s position using different reference systems. Tropical signs divide the zodiac into equal sections starting at the March equinox. This site’s true sidereal chart uses the constellations’ unequal boundaries. The Sun has not moved between readings; the reference boundaries changed. These labels alone do not establish a personality trait.

Try chat

Free birth chart. Limited free chat, with your allowance shown before you send.

Not a Sign. A Composition.

Your mix is free. Structured modules that show how the mix operates in real life — that's the subscription.

The goal was never a label — it's authenticity: chosen, responsible, and yours.

See What Your Chart Reveals

Five systems. Your composition in 60 seconds.

Or check your dynamic with someone →

Why this is built the way it is

Astrology gets more accurate the more of it you account for, and that is not how something false behaves. Taking that seriously means computing it properly and then showing you the working, so the answer does not depend on trusting anyone's interpretation, including mine.

Which means the aim here is not to read your chart to you. It is to hand you the whole thing, in a form you can actually use, and teach you enough to read it yourself. There is a nineteen lesson course for exactly that, included with every reading.

Read our Mission & Vision →