How it works
Most compatibility tools compare two star signs and stop there. A sun sign is one factor out of six here — and not even the heaviest one.
The Cosmic Bond score reads two people across six separate dimensions, drawn from both Chaldean numerology and the birth chart. Each is scored on its own, then weighted. Nothing is averaged blindly: the factors that shape a relationship most carry the most weight.
| Dimension | What it compares | Weight |
|---|---|---|
| Life Path | The direction each of you is moving in, from the full date of birth | 25% |
| Birth Number | The inner self — natural temperament, from the day of the month | 20% |
| Sun sign | How each of you meets the world day to day | 20% |
| Element | Fire, Earth, Air or Water — the underlying temperature of the pairing | 15% |
| First letter | The opening sound of the name, which Chaldean treats as a name's engine | 10% |
| Name number | The full name reduced — the part of you that can be changed | 10% |
Life Path carries the most weight for a reason. Two people can share a sun sign and want entirely different lives. The Life Path is built from the whole date of birth, and it describes direction — what each person is working toward. When two paths point the same way, the ordinary friction of a relationship costs less.
Chaldean numerology doesn't treat numbers as a ranking. It treats them as a set of relationships. Every number from 1 to 9 has numbers it works easily with, numbers it is indifferent to, and numbers it grinds against.
A 1 (Sun) runs smoothly with 2, 3 and 9, and struggles with 6, 8 and 7. A 4 (Rahu) finds its footing with 5, 6, 8 and 7, and clashes hardest with 9. These pairings aren't sentimental — they are the same relationships used throughout Chaldean practice, and they are why two "good" numbers can still make a difficult pair.
When your Life Path is compared against your partner's, the result is named rather than scored at you:
| Result | What it means |
|---|---|
| Mirror Energy | The same number on both sides. Instant recognition — and the same blind spot, twice. |
| Deep Harmony | Each number counts the other a friend. The easiest pairing there is. |
| Natural Affinity | One reaches toward the other, who is neutral. Warm, low-effort. |
| Balanced | Mutual neutrality. Nothing pulls you together; nothing pushes you apart. |
| Push-Pull | One sees a friend, the other sees an obstacle. Magnetic, and tiring. |
| Friction | One is hostile, the other indifferent. Effort is required, and it shows. |
| Opposition | Mutual hostility. The hardest pairing — and often the most transformative. |
Underneath the sun signs sit the four elements, and they describe how two temperaments physically behave together.
The six dimensions combine into a single number out of ten, and that number lands in one of six bands.
| Score | Bond | What it describes |
|---|---|---|
| 8.5+ | Cosmic Bond | Rare. Alignment across nearly every dimension at once. |
| 7.0+ | Magnetic Bond | Strong natural pull, with enough difference to stay interesting. |
| 6.0+ | Complementary Bond | You cover each other's gaps. Works well when both of you notice. |
| 4.5+ | Growth Bond | Real differences. Rewarding for people willing to do the work. |
| 3.0+ | Karmic Bond | Intense, repetitive, hard to walk away from. Usually there to teach something. |
| Below 3 | Friction Bond | Opposition on most fronts. Possible — but never accidental. |
A low score is not a verdict. It describes where the effort in a relationship goes, not whether the relationship should exist. Plenty of long marriages sit in Growth and Karmic territory — those couples simply know what they are working with. The reading is a map of the terrain, not a ruling on the journey. Anyone who tells you a birth date can end a relationship is selling certainty that numbers cannot give.
Some combinations are distinctive enough that the calculator names them when they appear.
Both, deliberately. Three dimensions come from Chaldean numerology (Life Path, Birth Number, name) and three from the birth chart (sun sign, element, and how those interact). They answer different questions, and a compatibility reading built on only one of them is thinner than it looks.
In Chaldean practice the birth date is fixed but the name is not — it is the part of your signature you can actually change. The first letter is treated as the engine of a name, which is why it is scored separately from the name as a whole. Together they account for 20% of the result.
Not for this. The bond score runs on names and birth dates alone. Birth times unlock the deeper chart work — the houses and the finer chart angles — which is what the full Bond report reads.
The dates cannot change. The name can, and it carries 20% of the score — which is why name alignment is a real practice rather than a superstition. But the honest answer is that most of a difficult pairing is not fixed by adjusting anything; it is handled by knowing where the friction sits and stopping the surprise.
No. Compatibility describes how much natural friction two people start with. What they do about it is not in the numbers.