When learning a new language, it’s crucial to share your thoughts and express when you’re unsure. It’s okay to say you don’t understand in a chat. This helps avoid confusion and makes it alright for everyone to ask questions.
If you’re open about not knowing something, others will likely help you out, which means you learn more and connect better. This method makes your communication more transparent and boosts your learning and helps you improve at the language.

Common Ways to Say “I Don’t Know” in Spanish
There are many ways to express uncertainty or admit a lack of knowledge in Spanish. Depending on the situation, tone, or region, these phrases can vary. In this section, you will discover common ways to say “I don’t know” in Spanish, helping you navigate conversations with confidence and clarity.
Spanish Phrase | English Meaning | Pronunciation |
---|---|---|
No sé | I don’t know | noh seh |
No lo sé | I don’t know it | noh loh seh |
No tengo idea | I have no idea | noh tehn-goh ee-dah |
No estoy seguro | I’m not sure | noh es-toy seh-goo-roh |
No tengo ni idea | I have no idea at all | noh tehn-goh nee ee-dah |
No sé nada | I don’t know anything | noh seh nah-dah |
No estoy claro | I’m not clear | noh es-toy klah-roh |
No tengo la menor idea | I have the slightest idea | noh tehn-goh lah meh-nor ee-dah |
No me acuerdo | I don’t remember | noh meh ah-kwehr-doh |
No lo recuerdo | I don’t remember it | noh loh reh-kwehr-doh |
No estoy al tanto | I’m not up to date | noh es-toy al tahn-toh |
No te sabría decir | I wouldn’t know how to tell you | noh teh sah-bree-ah deh-seer |
No tengo información | I have no information | noh tehn-goh in-for-mah-see-on |
Desconozco | I don’t know (about) | des-koh-nohs-koh |
No me consta | It doesn’t seem clear to me | noh meh kon-stah |
No lo tengo claro | I don’t have it clear | noh loh tehn-goh klah-roh |
No puedo contestar eso | I can’t answer that | noh pwedo kon-tes-tahr eh-so |
No te puedo decir | I can’t tell you | noh teh pwedo deh-seer |
No puedo darte una respuesta | I can’t give you an answer | noh pwedo dar-teh oo-nah reh-spweh-stah |
Ni idea | No idea | nee ee-dah |
No lo tengo presente | I don’t have it in mind | noh loh tehn-goh preh-sen-teh |
No puedo asegurarlo | I can’t assure it | noh pwedo ah-seh-goo-ahr-loh |
No lo he oído | I haven’t heard it | noh loh eh oh-ee-doh |
No me suena | It doesn’t ring a bell to me | noh meh swen-ah |
Me has dejado en blanco | You’ve left me blank | meh ahs deh-hah-doh en blahn-koh |
No te sé decir | I can’t tell you | noh teh seh deh-seer |
No puedo confirmarlo | I can’t confirm it | noh pwedo kon-feer-mahr-loh |
Estoy en las mismas | I’m in the same situation | es-toy en las mee-mas |
No lo tengo en la cabeza | I don’t have it in mind | noh loh tehn-goh en lah keh-bah |
No estoy informado | I’m not informed | noh es-toy in-for-mah-doh |
No lo puedo asegurar | I can’t assure it | noh loh pwedo ah-seh-goo-ahr |
No he tenido tiempo de averiguarlo | I haven’t had time to find out | noh eh teh-nee-doh ti-em-poh deh ah-veh-ree-gahr-loh |
No tengo datos | I have no data | noh tehn-goh dah-tos |
No soy la persona adecuada para eso | I’m not the right person for that | noh soy lah pehr-soh-nah ah-kweh-dah pah-rah eh-so |
No lo conozco | I don’t know him/her | noh loh koh-nohs-koh |
No me acuerdo en este momento | I don’t remember at this moment | noh meh ah-kwehr-doh en es-teh mo-men-toh |
No sé cómo responder | I don’t know how to respond | noh seh koh-moh reh-spon-dehr |
No lo tengo claro ahora | I don’t have it clear right now | noh loh tehn-goh klah-roh ah-oh-rah |
No sabría explicarlo | I wouldn’t know how to explain it | noh sah-bree-ah eks-plee-cahr-loh |
No puedo darte una respuesta clara | I can’t give you a clear answer | noh pwedo dar-teh oo-nah reh-spweh-stah klah-rah |

Additional Expressions for Uncertainty in Spanish
In Spanish, there are many ways to express uncertainty beyond the basic “no sé.” These expressions add depth and nuance to conversations, allowing speakers to communicate hesitation, doubt, or indecision. Learning these phrases helps improve fluency and better captures the subtleties of everyday communication.
Also See – How To Say Good Night In Spanish In 54 Dreamy Ways
Spanish Phrase | English Meaning | Pronunciation |
---|---|---|
Tal vez | Maybe | tahl behs |
Quizás | Perhaps | kee-sahs |
Puede ser | It could be | pwheh-deh ser |
No estoy seguro | I’m not sure | noh ehs-toy seh-goo-roh |
A lo mejor | Maybe / Perhaps | ah loh meh-hor |
Dudo que | I doubt that | doo-doh keh |
No tengo claro | I’m not clear | noh tehn-goh klah-roh |
No lo sé con certeza | I don’t know for sure | noh loh seh kon sehr-teh-sah |
Me parece que no | It seems to me that no | meh pah-reh-seh keh noh |
Es posible | It’s possible | ehs poh-see-bleh |
No me queda claro | It’s not clear to me | noh meh keh-dah klah-roh |
A lo mejor no | Maybe not | ah loh meh-hor noh |
Es probable que | It’s likely that | ehs proh-bah-leh keh |
Estoy en duda | I’m in doubt | ehs-toy en doo-dah |
No estoy convencido | I’m not convinced | noh ehs-toy kon-ven-see-doh |
No estoy del todo seguro | I’m not entirely sure | noh ehs-toy del toh-doh seh-goo-roh |
No tengo una respuesta clara | I don’t have a clear answer | noh tehn-goh oo-nah reh-spoo-eh-stah klah-rah |
Supongo que sí | I suppose so | soo-pon-goh keh see |
No me atrevo a decir | I don’t dare to say | noh meh ah-treh-voh ah deh-seer |
No puedo asegurarlo | I can’t assure it | noh pwheh-doh ah-seh-goo-r-loh |
No lo tengo claro | I’m not clear about it | noh loh tehn-goh klah-roh |
No estoy cien por cien seguro | I’m not a hundred percent sure | noh ehs-toy syen por syen seh-goo-roh |
Podría ser | It could be | poh-dree-ah ser |
No sabría decir | I wouldn’t know how to say | noh sah-bree-ah deh-seer |
No tengo certeza | I don’t have certainty | noh tehn-goh sehr-teh-sah |
Es una posibilidad | It’s a possibility | ehs oo-nah poh-see-bee-li-dah |
Tengo mis dudas | I have my doubts | tehn-goh mees doo-dahs |
No puedo garantizarlo | I can’t guarantee it | noh pwheh-doh gahr-ahn-tee-ahr-loh |
Diría que no | I would say no | dee-ree-ah keh noh |
No estoy muy seguro | I’m not very sure | noh ehs-toy mooy seh-goo-roh |
Parece dudoso | It seems doubtful | pah-reh-seh doo-doh-soh |
Es incierto | It’s uncertain | ehs in-see-er-toh |
Podría ser que no | It could be that no | poh-dree-ah ser keh noh |
No estoy tan seguro | I’m not that sure | noh ehs-toy tahn seh-goo-roh |
Puede que sí | It might be yes | pwheh-deh keh see |
No lo tengo claro del todo | I’m not completely clear about it | noh loh tehn-goh klah-roh del toh-doh |
No es seguro | It’s not certain | noh ehs seh-goo-roh |
No tengo idea clara | I don’t have a clear idea | noh tehn-goh ee-dah klah-rah |
No se puede saber | It can’t be known | noh seh pwheh-deh sah-behr |
Tengo mis reservas | I have my reservations | tehn-goh mees reh-ser-vahs |

Example I don’t know sentences in Spanish
Spanish Phrase | English Meaning | Pronunciation |
---|---|---|
No sé qué hacer. | I don’t know what to do. | noh seh keh ah-sehr |
No entiendo lo que dices. | I don’t understand what you’re saying. | noh en-tee-ehndoh lo keh dee-sehs |
No sé cómo resolver este problema. | I don’t know how to solve this problem. | noh seh koh-moh reh-sohl-vehr ehs-teh proh-bleh-mah |
No conozco esa palabra. | I don’t know that word. | noh koh-nohs-koh eh-sah pah-lah-brah |
No estoy seguro de la respuesta. | I’m not sure about the answer. | noh es-toy seh-goo-roh deh lah rehs-pwehs-tah |
No tengo idea de dónde está. | I have no idea where it is. | noh tehn-goh ee-deh-ah deh don-deh eh-stah |
No sé cómo llegar allí. | I don’t know how to get there. | noh seh koh-moh yeh-gahr ah-yee |
No sé si eso es cierto. | I don’t know if that’s true. | noh seh see eh-soh es see-air-toh |
No recuerdo cómo se dice eso. | I don’t remember how to say that. | noh reh-kwehr-doh koh-moh seh dee-seh eh-soh |
No sé qué significa. | I don’t know what it means. | noh seh keh seeg-nee-fih-kah |
No estoy seguro de qué estás hablando. | I’m not sure what you’re talking about. | noh es-toy seh-goo-roh deh keh eh-stahs ah-blahn-doh |
No sé cómo se pronuncia. | I don’t know how to pronounce it. | noh seh koh-moh seh proh-noon-syah |
No sé qué quieres decir. | I don’t know what you mean. | noh seh keh kyeh-res deh-seer |
No sé cómo explicarlo. | I don’t know how to explain it. | noh seh koh-moh eks-plee-kahr-loh |
No tengo información sobre eso. | I don’t have information about that. | noh tehn-goh een-for-mah-syohn soh-breh eh-soh |
No sé cuándo empieza. | I don’t know when it starts. | noh seh kwahn-doh ehm-pyeh-sah |
No sé dónde está el baño. | I don’t know where the bathroom is. | noh seh don-deh eh-stah el ban-yoh |
No sé qué hora es. | I don’t know what time it is. | noh seh keh oh-rah es |
No sé si puedo hacerlo. | I don’t know if I can do it. | noh seh see pweh-doh ah-sehr-loh |
No sé cómo funciona. | I don’t know how it works. | noh seh koh-moh foon-syoh-nah |
No tengo idea de cómo sucedió. | I have no idea how it happened. | noh tehn-goh ee-deh-ah deh koh-moh soo-seh-dyoh |
No sé si estaré disponible. | I don’t know if I will be available. | noh seh see ehs-tah-reh dis-poh-nee-bleh |
No sé qué más decir. | I don’t know what else to say. | noh seh keh mahs deh-seer |
No sé cuál es el plan. | I don’t know what the plan is. | noh seh kwahl es el plahn |
No sé por qué pasó. | I don’t know why it happened. | noh seh pohr keh pah-soh |
No sé dónde lo dejé. | I don’t know where I left it. | noh seh don-deh lo deh-heh |
No estoy seguro de qué hacer a continuación. | I’m not sure what to do next. | noh es-toy seh-goo-roh deh keh ah-sehr ah con-tee-nwah-syohn |
No sé cuánto cuesta. | I don’t know how much it costs. | noh seh kwahn-toh kweh-stah |
No sé qué debo llevar. | I don’t know what I should bring. | noh seh keh deh-boh yeh-vahr |
No sé si lo he hecho bien. | I don’t know if I’ve done it right. | noh seh see lo eh eh-choh byen |
No sé qué opciones tenemos. | I don’t know what options we have. | noh seh keh op-syoh-nes teh-neh-mohs |
No estoy seguro de haber entendido. | I’m not sure I understood. | noh es-toy seh-goo-roh deh ah-behr ehn-tehn-dee-doh |
No sé qué tan lejos está. | I don’t know how far it is. | noh seh keh tahn leh-hohs es-tah |
No sé si va a llover hoy. | I don’t know if it’s going to rain today. | noh seh see vah ah yoh-vehr oy |
No sé qué pensar al respecto. | I don’t know what to think about it. | noh seh keh pehn-sahr ah rehs-pehk-toh |
No sé cuál es tu opinión. | I don’t know what your opinion is. | noh seh kwahl es too oh-pee-nyohn |
No sé cómo arreglarlo. | I don’t know how to fix it. | noh seh koh-moh ah-rreh-glahr-loh |
No sé si lo he visto antes. | I don’t know if I’ve seen it before. | noh seh see lo eh vees-toh ahn-tays |
No sé qué sabor tiene. | I don’t know what it tastes like. | noh seh keh sah-bohr tee-eh-neh |
No sé cuánto tiempo tomará. | I don’t know how long it will take. | noh seh kwahn-toh tee-em-poh toh-mah-rah |
Conclusion
To put it simply, knowing how to say “I don’t know,” “I don’t understand,” and “I’m not sure” in Spanish is essential. These phrases help a lot when you’re talking and things aren’t clear. They also help you connect better with people who speak Spanish natively. Using these phrases correctly makes learning and cultural exchanges more accessible and enjoyable. So, it’s a good idea to use them regularly in your conversations to improve Spanish.