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We use Wu Xing (5 Elements) — Wood, Fire, Earth, Metal, Water — calculated from each person's birth year. Then we compare the relationship between both elements.
The system uses traditional Chinese astrology principles, but real-life compatibility depends on communication and understanding too.
Yes! It's not limited to romantic couples. Try it with friends, business partners, or family members.
Element conflicts indicate areas requiring more communication and patience. Many "incompatible" couples thrive through awareness and effort.
A couple compatibility reading — known in astrology as synastry — compares the birth charts of two people to see how well they match, where their strengths lie, and where friction may arise. It works for romantic partners, friends, business partners, and family members.
Several systems are used together:
The Wu Xing (Five Elements) system used in this tool has deep roots — the theory of Wood, Fire, Earth, Metal, and Water first took organized shape during China's Spring and Autumn period (770–476 BCE) and was later woven into the Chinese zodiac, where each of the 12 zodiac animals carries a "fixed element" tied to its birth year. Compatibility between two people is read through how their elements interact — some pairings nourish each other, some restrain each other, and neither pattern is automatically good or bad.
Wu Xing compatibility isn't random guesswork — it follows two classical cycles that have shaped Chinese astrology for centuries:
| Cycle | Relationship | What it means for a couple |
|---|---|---|
| Generating (Sheng) | Water → Wood → Fire → Earth → Metal → Water | One element nourishes the other — usually a supportive, easy-flowing match |
| Controlling (Ke) | Wood → Earth, Earth → Water, Water → Fire, Fire → Metal, Metal → Wood | One element restrains the other — can create friction, but also balance and discipline |
| Same element | e.g. Fire + Fire | Shared instincts and pace, though it can amplify shared weaknesses too |
Neither cycle is automatically "good" or "bad." A generating pair tends to feel effortless from day one, but a controlling pair often pushes both people to grow — many long, successful relationships involve exactly this kind of productive tension rather than easy harmony.
This web tool keeps the method deliberately simple and transparent, so you can check any result by hand. It works in three steps.
Step 1 — Find each person's element from the last digit of their birth year. In Chinese astrology each year carries a Heavenly Stem, and every stem belongs to one of the five elements. The last digit of the year tells you which:
| Year ends in | Element | Example years |
|---|---|---|
| 0 or 1 | ⚙️ Metal | 1990, 1991, 2000, 2001 |
| 2 or 3 | 💧 Water | 1992, 1993, 2002, 2003 |
| 4 or 5 | 🌳 Wood | 1984, 1985, 1994, 1995 |
| 6 or 7 | 🔥 Fire | 1986, 1987, 1996, 1997 |
| 8 or 9 | 🪨 Earth | 1988, 1989, 1998, 1999 |
Step 2 — Check how the two elements relate, using the generating and controlling cycles in the table above. Any two of the five elements are either the same, in a generating relationship, or in a controlling relationship.
Step 3 — Turn the relationship into a score. Because there are only three kinds of relationship, this tool produces only three possible scores:
| Relationship | Score | Label shown | Worked example |
|---|---|---|---|
| Same element | 74 | 💕 Highly Compatible | Born 1994 + born 1995 → Wood + Wood |
| Generating (one feeds the other) | 65 | 😊 Normal | Born 1990 + born 1993 → Metal feeds Water |
| Controlling (one restrains the other) | 28 | 🔥 High Tension | Born 1996 + born 2000 → Fire melts Metal |
If you see a different number in a full reading inside the Mooteeter app, that is because the app combines more systems (such as birth day and zodiac animal). The web tool on this page uses the element step only, which is why its answers are always one of these three.
One honest limitation: traditionally the Chinese year does not start on 1 January. It starts at Chinese New Year, or at Lichun (around 4 February) in Bazi practice. This tool uses the calendar year, so if you were born in January or early February, your traditional element may belong to the previous year. For example, someone born on 20 January 1996 would usually be counted as a 1995 Wood person rather than a 1996 Fire person. If that applies to you, enter the previous year to see the traditional result.
Why same-element pairs score highest here: the tool rewards two people who share an element because they tend to share pace and instincts. A generating pair is still supportive, but the giving runs mostly one way, so it lands in the middle. A controlling pair gets the lowest score because the relationship involves pressure, which, as noted above, is not the same as being doomed.
Q: If the reading says we don't match, should we break up?
A: No. Compatibility is a guide, not a verdict. Couples with a low score who truly love and work to understand each other can last a lifetime.
Q: Which system is the most accurate?
A: No single system is "most accurate." Mooteeter blends several systems for a balanced overall picture.
Q: Can I use it for family or friends?
A: Yes — synastry works for every kind of relationship, not just romance.
Q: What does it mean if we're in the "controlling" cycle?
A: It means your elements create tension rather than flow — not a red flag by itself, but a sign that communication and clear boundaries matter more for this pairing.
Q: Does compatibility change over time?
A: Your Wu Xing element is fixed by birth year, so the base reading doesn't change — but how two people apply that dynamic in daily life absolutely can, and usually does, evolve.
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