Spanish vocabulary · Beginner

How to Say By the Way in Spanish

Por cierto · phrase · pohr see-EHR-toh

'Por cierto' is the go-to Spanish phrase for 'by the way,' used to casually introduce a side topic or add an afterthought during conversation.

pohr see-EHR-toh

Por cierto, ¿ya compraste los boletos?

By the way, did you already buy the tickets?

By the way in Spanish: Quick Reference

Below are the most common Spanish words for by the way, with pronunciation and regional usage notes.

SpanishEnglishPronunciationRegion / Register
por ciertoby the waypohr see-EHR-tohDefault, widely understood
a propósitoby the wayUniversal (by the way / on purpose, depending on context)
hablando deby the wayUniversal (speaking of, used to shift topics)
dicho sea de pasoby the wayUniversal (by the way, more formal or literary)

How Native Speakers Use Por cierto

Real example sentences across three contexts you'll actually run into.

Introducing a new topic

Por cierto, mañana no hay clases.

By the way, there are no classes tomorrow.

Casually mentioning something during a conversation with classmates.

Adding an afterthought

A propósito, tu mamá llamó hace una hora.

By the way, your mom called an hour ago.

Remembering to pass along a message.

Shifting the conversation

Hablando de viajes, ¿ya reservaste el hotel?

Speaking of travel, did you already book the hotel?

Transitioning from one topic to a related one in a natural way.

Avoid These Mistakes When Using Por cierto

Literal translation

Incorrect: Por el camino, ¿ya terminaste el proyecto?

Correct: Por cierto, ¿ya terminaste el proyecto?

'Por el camino' translates literally to 'by the road/path' and does not convey the conversational meaning of 'by the way.' The correct idiomatic expression is 'por cierto.'

Confusing a propósito meanings

Incorrect: Lo hice a propósito de cambiar de tema.

Correct: A propósito, quiero cambiar de tema.

When used as 'by the way,' 'a propósito' stands alone at the beginning of a sentence. Using 'a propósito de' changes the meaning to 'regarding' or 'with respect to.'

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See Por cierto used by native speakers

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Common Questions About By the way in Spanish

Is 'por cierto' used the same way in Spain and Latin America?
Yes, 'por cierto' is universally understood and used across all Spanish-speaking countries. It functions identically everywhere as a way to introduce a side note or change the subject smoothly.
Can 'a propósito' also mean 'on purpose'?
Yes, 'a propósito' has a dual meaning. It can mean 'by the way' when used at the start of a sentence, or 'on purpose' when used after a verb, as in 'Lo hizo a propósito' (He did it on purpose). Context makes the meaning clear.
When should I use 'dicho sea de paso' instead of 'por cierto'?
'Dicho sea de paso' is a more formal or literary expression that literally means 'let it be said in passing.' It is best suited for written texts, speeches, or formal conversation, while 'por cierto' fits casual everyday dialogue.