Context
You mention you need a plumber and your friend happens to be one.
Pues resulta que...
'Well it turns out that...' — resultar is the go-to verb for convenient coincidences in Spanish.
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sayingsSaying 10 of 25
as it happens
Conversational pivot — used to introduce a convenient coincidence or a relevant fact, often with mild surprise.
Literal translation trap
'Como sucede' is too literal and sounds like a documentary. The Spanish has a completely different feel.
Say it like this
Context
Someone asks if you've met the new boss and you have.
Pues mira, da la casualidad de que sí.
As it happens, yes — da la casualidad is the closest direct equivalent to 'as it happens.'
Context
Revealing you already knew the answer all along.
Casualmente, ya lo sabía.
Casualmente = coincidentally, as it happens — slightly formal but very natural.
Context
Bringing up a relevant fact at exactly the right moment.
Qué curioso que lo menciones.
'How curious that you mention it' — cues the relevant information with mild surprise.
Context
A serendipitous connection at a party.
Mira tú qué casualidad.
Well what a coincidence — warm, slightly amused. Very natural spoken Spanish.