Spanish vocabulary · Beginner
How to Say Therefore in Spanish
Por lo tanto · adverb · pohr loh TAHN-toh
The Spanish equivalent of therefore is 'por lo tanto,' a transitional phrase used to express a logical consequence. Informal speech often uses 'por eso' (that's why), while 'por consiguiente' sounds more academic.
Say 'por lo tanto' as pohr loh TAHN-toh. Each word is clearly separated, with the main stress on 'tanto.'
Llovió mucho, por lo tanto el evento se canceló.
It rained a lot, therefore the event was canceled.
therefore in Spanish: Quick Reference
Below are the most common Spanish words for therefore, with pronunciation and regional usage notes.
| Spanish | English | Pronunciation | Region / Register |
|---|---|---|---|
| por lo tanto | therefore | pohr loh TAHN-toh | Default, widely understood |
| por eso | therefore | informal, that's why | |
| por consiguiente | therefore | formal |
How Native Speakers Use Por lo tanto
Real example sentences across three contexts you'll actually run into.
Logical conclusion
No estudié, por lo tanto reprobé el examen.
I didn't study, therefore I failed the exam.
Explaining cause and effect.
Informal conversation
Estaba cansado, por eso me fui temprano.
I was tired, therefore I left early.
Using the casual equivalent.
Formal writing
Los datos son insuficientes; por consiguiente, se necesita más investigación.
The data is insufficient; therefore, more research is needed.
Academic or professional writing.
Avoid These Mistakes When Using Por lo tanto
Using 'por tanto' without 'lo'
Incorrect: Está enfermo, por tanto no vendrá.
Correct: Está enfermo, por lo tanto no vendrá.
While 'por tanto' exists and is used in some formal writing, the standard and most common form is 'por lo tanto' with the article 'lo.'
Confusing 'por eso' with 'por ello' in casual speech
Incorrect: Llueve, por ello no salimos (in casual talk).
Correct: Llueve, por eso no salimos.
'Por ello' is grammatically correct but very formal. In casual conversation, 'por eso' sounds more natural and is widely preferred.
Lock in therefore Vocabulary with the Parrot Method
Why word lists alone don't stick
Memorizing a translation feels productive, but most learners forget 70% of what they studied within 48 hours. Vocabulary needs spaced repetition AND real-world exposure to transfer to long-term memory.
See Por lo tanto used by native speakers
Parrot's short-form videos feature native speakers using por lo tanto in real situations. Context-based exposure beats flashcards, you hear Llovió mucho, por lo tanto el evento se canceló. while watching someone live the moment, connecting meaning, sound, and rhythm at once.
Save, review, repeat, stay consistent
Tap any word to save it. Parrot's spaced-repetition system surfaces it right before you'd forget, no manual flashcard creation. The watch, parrot back, save, review cycle turns recognition into fluency at 2.7x the speed of traditional study.
Common Questions About therefore in Spanish
- What is the difference between 'por lo tanto' and 'por eso'?
- Both express cause and effect, but 'por lo tanto' is more formal and structured, while 'por eso' (that's why / so) is the informal choice used in everyday conversation.
- Can 'por lo tanto' start a sentence?
- Starting a sentence with 'por lo tanto' is perfectly acceptable in Spanish, especially in formal or academic writing, to introduce a conclusion drawn from previous statements.
- Are there other synonyms for 'therefore' in Spanish?
- Additional options include 'en consecuencia' (as a consequence), 'así que' (so), and 'de modo que' (so that) — each with slightly different registers and formality levels.