Compatibility Calculator

A number with no meaning at all, and that is the point

Entering Alex and Sam produces a compatibility score of 13 with the verdict "Keep getting to know each other!"

This is entertainment. There is no science here, no research, no predictive validity — and stating that plainly is more useful than any result the tool can produce.

How the number is generated

The calculation is a deterministic function of the letters in the two names. The characters are converted to numeric values, combined, and reduced to a score in a fixed range.

The essential properties: it is consistent — the same two names always give the same number — and it is arbitrary, in that the mapping from letters to a compatibility figure encodes nothing about human relationships.

Swap a single letter and the score changes completely. Enter the names in the other order and it may change again. Neither variation reflects anything about the people involved, because nothing about the people is being measured.

Why these tools are appealing

Name-based compatibility scoring has a long history across cultures — numerology, name-matching traditions, and various astrological systems all assign significance to names. The appeal is genuine and worth understanding rather than dismissing.

Two well-documented psychological effects explain why the results feel meaningful:

The Barnum effect — people rate vague, generally applicable statements as highly accurate descriptions of themselves specifically. "Keep getting to know each other" applies to essentially every developing relationship, which is what makes it feel apt.

Confirmation bias — a result matching what you hoped is remembered and shared; one that does not is dismissed as "just a bit of fun". The tool appears accurate because only the hits are counted.

What actually predicts relationship outcomes

Since the question underneath is a real one, the research is worth knowing. Longitudinal studies of couples — most extensively by John Gottman and colleagues — consistently identify behavioural patterns rather than fixed attributes as predictive:

How conflict is handled matters far more than how often it occurs. Criticism, contempt, defensiveness and stonewalling are the patterns most strongly associated with relationship breakdown, with contempt the single strongest signal.

The ratio of positive to negative interactions during disagreement, with stable relationships showing roughly five positive exchanges for each negative one.

Responsiveness to bids for attention — whether small everyday overtures are turned towards or away from.

Shared values on the decisions that compound — money, children, where to live, how to treat family.

None of these is knowable from a name, and all of them are observable in a few months of actually spending time together.

Reading the result

Enjoy it and disregard it. If the number is high, it tells you nothing. If it is low, it tells you exactly as much.

The one genuine caution: do not let a novelty result influence an actual decision, in either direction. People do occasionally cite tools like this half-seriously when they are already uncertain about something, and a randomly generated number is a poor reason to act on — or ignore — a real feeling.

Common mistakes

Treating the score as meaningful. It encodes nothing about either person.

Re-running with nicknames until the score improves. The variation is arbitrary, not informative.

Reading the verdict as personalised. The phrasing is deliberately general.

Letting it affect a real decision. It is a novelty, and it should stay one.