How To Say "I Don't Know" In Spanish

By | August 27, 2022
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The phrase “I don’t know” is a very common one, and is used in many different situations. Whether you’re trying to answer a question, avoid a conversation, or simply express your lack of knowledge, it’s important to know how to say “I don’t know” in Spanish.

In this article, we’ll explain how to say “I don’t know” in Spanish, as well as some other phrases you can use when you’re not sure of the answer. We’ll also discuss some tips for communicating confidently in Spanish.

The Basics: How to Say “I Don’t Know” in Spanish

The phrase “I don’t know” in Spanish is “No sé.” To make it more polite, you can add the phrase “lo siento” or “perdón,” which mean “I’m sorry” or “excuse me.” For example, you could say “No sé, lo siento” or “No sé, perdón.”

It’s also important to note that the phrase “No sé” is usually used when you’re asked a direct question that you don’t know the answer to. If you’re not sure of something in a more general sense, you can use the phrase “No tengo ni idea,” which literally translates to “I don’t have any idea.”

More Ways to Say That You Don’t Know in Spanish

In addition to “No sé,” there are several other phrases you can use when you don’t know something in Spanish. Here are a few of the most common:

  • No lo sé.
  • No tengo la menor idea.
  • No estoy seguro.
  • No lo sé a ciencia cierta.
  • No tengo la respuesta.
  • No tengo ni la más remota idea.

Tips for Communicating Confidently in Spanish

Whether you’re trying to say “I don’t know” in Spanish or communicate in Spanish in general, it’s important to have confidence in your abilities. Here are a few tips to help you communicate confidently in Spanish:

  • Practice speaking Spanish as often as you can. The more you practice, the more comfortable you’ll become.
  • Listen to Spanish-language media, such as podcasts, radio shows, and music.
  • Watch Spanish-language television shows and movies.
  • Read books, newspapers, and magazines in Spanish.
  • Try to use Spanish whenever you can, even if you make mistakes. Don’t be afraid to make mistakes, as it’s part of the learning process.
  • Use online resources, such as apps, websites, and online courses, to help you learn Spanish.


Knowing how to say “I don’t know” in Spanish is an important part of communicating in Spanish. By using the phrase “No sé,” as well as other phrases like “No tengo ni la más remota idea,” you can express your lack of knowledge in a polite and respectful way. And by following the tips above, you can become a more confident Spanish speaker.