Spanish has only five vowel sounds, one for each written vowel: a, e, i, o, u. Unlike English, where a single letter can represent many different sounds (think of the "a" in cat, father, cake, and about), each Spanish vowel is pronounced the same way every time. This consistency is one of the reasons Spanish spelling is so predictable.
The Five Pure Vowels
Each Spanish vowel is a pure, short, unchanging sound. There are no diphthongs hidden inside a single vowel letter, and there is no reduction to a schwa in unstressed syllables.
| Letter | IPA | English Approximation | Example |
|---|---|---|---|
| a | [a] | like a in "father" (shorter) | casa |
| e | [e] | like e in "bet" (purer) | mesa |
| i | [i] | like ee in "see" (shorter) | sí |
| o | [o] | like o in "more" (purer) | lobo |
| u | [u] | like oo in "boot" (shorter) | luna |
La casa es azul.
The house is blue.
El elefante es enorme.
The elephant is enormous.
Mi tío vive en Chile.
My uncle lives in Chile.
Todo el oro es amarillo.
All gold is yellow.
Un burro come uvas.
A donkey eats grapes.
Why Spanish Vowels Sound Different from English
English vowels are often diphthongized, meaning they glide from one sound to another. The English "o" in go, for example, actually moves from [o] to [u] — it sounds like "gou". Spanish vowels do not glide. They begin and end in exactly the same position.
English also reduces unstressed vowels to a schwa [ə], the neutral sound in "sofa" or "about". In Spanish, every vowel keeps its full value, even in unstressed syllables. The first and last a in banana are both pronounced [a].
Banana se pronuncia con tres aes iguales.
"Banana" is pronounced with three identical a's.
Compara: "casa" y "cosa" solo cambian una vocal.
Compare: "casa" and "cosa" differ only in one vowel.
Strong and Weak Vowels
Spanish divides its five vowels into two groups, which matters when vowels meet each other inside a word.
| Group | Vowels | Also Called |
|---|---|---|
| Strong | a, e, o | vocales abiertas (open vowels) |
| Weak | i, u | vocales cerradas (closed vowels) |
When a strong and a weak vowel appear next to each other, they usually form a diphthong — a single syllable with a gliding quality (for example, bueno, cielo). When two strong vowels meet, they form a hiatus and belong to separate syllables (for example, teatro, caos). Learn more in Diphthongs and Hiatus.
La palabra "bueno" tiene un diptongo: ue.
The word "bueno" has a diphthong: ue.
La palabra "teatro" tiene un hiato: ea.
The word "teatro" has a hiatus: ea.
Minimal Pairs
Because vowels change meaning, it is crucial to pronounce them clearly. Mixing up vowels can create an entirely different word.
| Word 1 | Word 2 | Difference |
|---|---|---|
| casa (house) | cosa (thing) | a vs o |
| pelo (hair) | palo (stick) | e vs a |
| vino (wine) | vano (vain) | i vs a |
| muro (wall) | moro (Moor) | u vs o |
Further Reading
- Learn how vowels stack together in Diphthongs and Hiatus.
- Learn which syllable gets emphasized in Stress Rules.
- Review the Spanish Alphabet for names of each letter.
Related Topics
- The Spanish AlphabetA1 — The 27 letters of the Spanish alphabet, their names, and an overview of pronunciation
- Diphthongs and HiatusA2 — How strong and weak vowels combine into diphthongs or split into hiatus
- Stress RulesA2 — The three rules that determine which syllable of a Spanish word is stressed