How this love calculator actually works
No mysticism, no server, no database of couples. Both names are lowercased, stripped of spaces and punctuation, sorted alphabetically so the order does not matter, and run through a FNV-1a hash — a standard, fast, deterministic hashing function used in ordinary software.
The hash produces a large number, and that number is mapped into the 45–100 range. Three more hashes with different seeds produce the chemistry, friendship and long-term sub-scores.
The two consequences that matter:
- It is deterministic. The same two names always give the same score, today and in ten years. No refreshing until you get a better answer.
- It is symmetric. "Alex and Jordan" scores exactly the same as "Jordan and Alex".
The star-sign layer, and how it is scored
Enter both birthdays and the calculator works out each person's western star sign, then scores the pairing on element compatibility — the oldest and simplest rule in astrology. The four elements are Fire (Aries, Leo, Sagittarius), Earth (Taurus, Virgo, Capricorn), Air (Gemini, Libra, Aquarius) and Water (Cancer, Scorpio, Pisces).
| Pairing | Traditional reading | Score used |
|---|---|---|
| Same element | Instinctive understanding | 92 |
| Fire + Air | Air feeds fire — energising | 88 |
| Earth + Water | Water nourishes earth — steady | 88 |
| Air + Water | Different languages | 58 |
| Air + Earth | Ideas versus practicalities | 55 |
| Earth + Fire | Fire scorches earth | 52 |
| Fire + Water | Water douses fire | 48 |
The final percentage is 60% name hash and 40% element score. Leave the birthdays blank and the score is the name hash alone. Both halves are deterministic, so the number never changes.
Note that a birthday within a day of a cusp may land on the wrong side — the sun's entry into each sign shifts slightly year to year. If it matters to you, and it should not, check your exact birth time.
Why name-based compatibility is nonsense (and still fun)
Let us be completely straight: there is no research linking the letters in someone's name to relationship outcomes. Names are assigned by parents, changed by marriage, shortened by friends and spelled differently across languages. A calculator that gives "Katie" and "Catherine" different scores is telling you about spelling, not about love.
What decades of relationship research does point to, from the work of John Gottman and others:
- How couples handle conflict predicts far more than how well they get along at the start.
- Responsiveness — turning toward small bids for attention — is the strongest day-to-day signal.
- Shared values beat shared hobbies by a wide margin.
- Contempt is the single most corrosive behaviour, and the most reliable predictor of separation.
None of that fits in a percentage. That is rather the point.
The honest way to use a result like this
A love calculator is a conversation starter dressed up as a measurement. Its actual function is to give two people an excuse to talk about something they were already thinking about, with the number as cover. That is a genuinely useful social device — it is just not a measurement.
If you got a low score and it stung slightly, that is information — not about the relationship, but about how much you were hoping for a high one. Do with that what you like.