Spanish -  · Updated July 2026

How to Say 31 in Spanish | Treinta y Uno Pronunciation Guide

The cardinal number for 31 in Spanish is "treinta y uno" (IPA phonetic pronunciation: /ˌt̪ɾẽĩn̪.t̪a i ˈu.no/). Here's a breakdown of the word:

  • “Treinta” (IPA: /t̪ɾẽĩn̪.t̪a/) - This means "thirty".
  • “Y” (IPA: /i/): This means "and".
  • “Uno” (IPA: /ˈu.no/) - This means "one".

Pronunciation Guide for Treinta y Uno and Trigésimo Primero

To pronounce 31 in Spanish, listen to the audio clips below:

Ordinal Number: Trigésimo Primero

Want to improve your Spanish?

The Spanish Frequency Dictionary series covers the 10,000 most common Spanish words — ranked by how often native speakers actually use them, with IPA pronunciation, English translations, and bilingual example sentences at every level.

Browse all 4 volumes →

The ordinal number for 31 in Spanish is "trigésimo primero" (IPA: /tɾiˌxesimo pɾiˈmeɾo/). Here's a breakdown of the word:

  • “Trigésimo” (IPA: /tɾiˈxesimo/) - This means thirtieth.
  • “Primero” (IPA: /pɾiˈmeɾo/): This means first.

How to Use "Treinta y Uno" in a Sentence

Here are some example sentences using the cardinal number "treinta y uno":

  • Tengo treinta y un años.
  • (I am thirty-one years old.)

  • Hoy es el treinta y uno de octubre.
  • (Today is October 31st).

  • Compré treinta y un dulces para la fiesta.
  • (I bought thirty-one candies for the party.)

  • Necesito treinta y un dólares para comprar esto.
  • (I need 31 dollars to buy this).

  • La temperatura es de 31 grados Celsius.
  • (The temperature is 31 degrees Celsius).

How to Use "Trigésimo Primero" in a Sentence

Here are some example sentences using the ordinal number "trigésimo primero":

  • Mi cumpleaños es el trigésimo primero de marzo.
  • (My birthday is March 31st).

  • El trigésimo primer episodio de mi serie favorita fue el mejor.
  • (The thirty-first episode of my favorite series was the best).

Cultural Significance of Number 31 in Spanish-Speaking Countries

The number 31 holds cultural significance in many Spanish-speaking countries, particularly on October 31st. In Mexico and other Latin American nations, the Day of the Dead celebrations often culminate on November 2nd, but the vigil begins on October 31st.

Comparison with Other Languages

In English, thirty-one is "thirty one," while in French it's "trente et un." This comparison highlights how different languages structure numbers uniquely.

How to Say Thirty-One in Spanish: Formal Settings and Beyond

"Treinta y uno" is commonly used in both formal and informal settings. However, when writing formally or in legal documents, it's often more appropriate to use "trigésimo primero."

Spanish Frequency Dictionary 1 — most common Spanish words
Master Spanish vocabulary faster →
2,500 most common Spanish words with IPA pronunciation & bilingual example sentences

Build Your Spanish Vocabulary Systematically

The fastest way to grow your Spanish vocabulary is to start with the words you'll actually encounter every day. The Spanish Frequency Dictionary covers the 2,500 most common Spanish words, each with IPA pronunciation, an English translation, and bilingual example sentences.

Browse the full range of Spanish frequency dictionaries to find the volume that matches your level.


Leave a comment

Please note, comments must be approved before they are published