How to Say "I don't know" in Spanish
The most natural way to say "I don't know" in Spanish is no sé. Tap the speaker above to hear it, then say it back out loud. That is the fastest way to make it stick.
Other ways to say it
When to use it
Use 'no sé' when you genuinely don't have the answer to a question. It's a common phrase in everyday conversations. You can use it in both formal and informal situations. If you want to emphasize your uncertainty, you might choose 'no lo sé'.
Say it out loud, get corrected
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Examples in Spanish
| Spanish | English |
|---|---|
| ¿Dónde está la biblioteca? No sé. | Where is the library? I don't know. |
| No sé qué hacer en esta situación. | I don't know what to do in this situation. |
The fastest way to remember it
Vocabulary you only read fades fast. Vocabulary you say out loud sticks. Hear no sé, repeat it a few times, then use it in a real sentence. SPAIKING lets you practice exactly that, speaking Spanish with a coach that corrects your pronunciation in real time. You can start with two free conversations.
Frequently asked questions
Is 'no sé' considered informal?
No, it's appropriate for both formal and informal contexts.
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