Spanish Syllable Counter: Poem Meter and Sinalefa Detection
What is a Spanish syllable counter and what is it for?
A Spanish syllable counter is a tool that splits Spanish words into their minimum phonetic units and returns the total. Unlike a plain word or character counter, a Spanish syllable counter applies the orthographic and prosodic rules of Spanish: it distinguishes diphthongs from hiatuses, recognizes inseparable consonant clusters, and in poetry mode it detects sinalefas and applies the final-stress law.
This tool has two modes. Grammatical mode splits each word in isolation, useful for speech therapy, teaching Spanish as a foreign language and any linguistic analysis. Poetry Meter mode reads the text verse by verse, applying the prosodic phenomena that determine the metric count: sinalefa between words, adjustments based on the last word's stress, and automatic classification of the verse type. All processing happens in your browser, no text leaves your device.
Basic syllabification rules in Spanish
Before getting into meter, here are the four rules that govern Spanish syllabification. Our Spanish syllable counter applies them internally to deliver the correct count in either mode.
Diphthongs
A diphthong joins two vowels in one syllable. It forms when an open vowel (a, e, o) combines with an unstressed close vowel (i, u without tilde) or two distinct close vowels. Examples: rei-no, cau-sa, cui-da-do. A tilde on the open vowel does not break the diphthong (náu-ti-co); a tilde on the close vowel does, producing a hiatus.
Triphthongs
A triphthong groups three vowels into a single syllable as unstressed close + open + unstressed close. Examples: buey, miau, cam-biáis. They are uncommon and never tilde the close vowels.
Hiatuses
Hiatuses split two adjacent vowels into separate syllables. Three kinds: two open vowels (ca-er, po-e-ta), two equal vowels (le-er) and the open + tilded close combination (pa-ís, ba-úl).
Inseparable consonant clusters
Some clusters never split: pr, br, tr, dr, cr, gr, fr, pl, bl, cl, gl, fl, plus the digraphs ch, ll, rr. When they appear between vowels, the whole cluster stays with the next syllable: pa-tria, co-pla, ca-rro. Otherwise the cluster splits: ár-bol, cos-ta.
Poetic meter: grammatical vs metric syllables
In Spanish poetry, syllables are not counted word by word but verse by verse, and two extra rules apply that can change the total.
Sinalefa
Sinalefa merges the final vowel of one word with the initial vowel of the next into a single metric syllable. The silent initial "h" does not block sinalefa: «la heroína» reads as la-he-roí-na with la and he fused. Almost every classical Spanish verse applies sinalefa by default. If you want to compare keeping or breaking a specific arc, click on its ‿ symbol in the analysis and this Spanish syllable counter will recompute the verse instantly.
Final-stress law
The stress of the verse's last word adjusts the count: an oxytone (acute, stress on the last syllable) adds 1; a proparoxytone (esdrújula, stress on the antepenultimate) subtracts 1; a paroxytone (llana, stress on the penultimate) adds 0. Identical grammatical sums can therefore yield a hendecasyllable, a decasyllable or a dodecasyllable depending on the line ending.
Dieresis and synaeresis
Dieresis splits a diphthong into two syllables (rü-i-do) and is marked orthographically with two dots over the close vowel. Synaeresis does the opposite: it merges two vowels that would normally form a hiatus (poe-ta counted as two syllables). Both are voluntary author choices; our analyzer doesn't auto-detect them but you can manually toggle any sinalefa arc.
Verse types by syllable count
Once sinalefa and tonic adjustment are applied, the result maps onto traditional Spanish nomenclature. The 9-syllable boundary separates arte menor from arte mayor.
Arte menor verses (2–8 syllables)
Disyllable, trisyllable, tetrasyllable, pentasyllable, hexasyllable, heptasyllable and octosyllable. They are the favorite meters of romance, popular coplas, villancicos and traditional lyric poetry. The 8-syllable line is the oldest and most popular Spanish verse.
Arte mayor verses (9–14 syllables)
Enneasyllable, decasyllable, hendecasyllable, dodecasyllable, tridecasyllable and alexandrine. Even-syllable lines often appear in mixed stanzas or hymns; odd-syllable lines are preferred by cultured poetry. Beyond 14 syllables we speak of a hyperverse.
The hendecasyllable, the gold of Spanish poetry
The hendecasyllable (11 syllables) is the most prestigious meter in Spanish since Boscán and Garcilaso imported it from Italian in the 16th century. It carries the sonnet, the silva and the octava real. When this Spanish syllable counter labels a verse as endecasílabo, you are using one of the canonical forms of cultured lyric.
Alexandrine and caesura
The alexandrine (14 syllables) has a mandatory caesura that splits it into two 7-syllable hemistichs. The caesura can break the sinalefa that crosses it; reproduce that count by clicking the corresponding arc to disable it.
How to use the Spanish syllable counter step by step
- Paste your text or upload a PDF, DOCX or TXT file (up to 10 MB). You can also click one of the four preset poems: Lorca, Quevedo, Bécquer or modern rap.
- Pick the mode. Grammatical splits each word as in a dictionary. Poetry Meter reads verse by verse, applying sinalefa and the final-stress law.
- Read the results. Each verse appears with its syllables, total count, type (octosyllable, hendecasyllable…), final stress and the ‿ arcs marking sinalefas. The right panel shows verse distribution and, in Poetry Meter mode, the detected rhyme scheme.
- Iterate and export. Click any sinalefa to toggle it; download the PDF report or embed your analysis on another site via the Embed button.
Rhyme schemes: assonant, consonant and mixed
Rhyme is measured from each verse's last stressed vowel to the end. Consonant rhyme matches every sound from that vowel onwards (vowels and consonants): amor rhymes consonantly with calor. Assonant rhyme matches only the vowels: noche rhymes assonantly with torre (o-e in both).
Our analyzer assigns a letter (A, B, C…) to each verse in order of first appearance. Uppercase for arte mayor, lowercase for arte menor. The pattern reveals the stanza form: ABAB is cruzada, ABBA is abrazada, AABB is pareada, AAAA is monorrima. The tool also reports the percentage of consonant and assonant rhymes. To find words that repeat too often inside a poem, complement this analysis with our repeated words finder.
Who needs to count syllables?
Different audiences benefit from a Spanish syllable counter with metric analysis:
Literature students
To correctly identify the meter of a sonnet, a silva or a romance in their Spanish Language and Literature exams. The auto-label of verse type saves manual calculation time.
Poets and lyricists
To compose in fixed forms (hendecasyllable, octosyllable, alexandrine) or to review the regularity of free-verse poems. Rap and trap lyricists use a Spanish syllable counter to keep the flow constant across the stanza.
Spanish-language teachers
To prepare teaching materials with highlighted verse analysis exportable as PDF. The tool turns a 15-minute manual analysis into a few seconds of work.
Speech therapists and Spanish-as-foreign-language teachers
To verify isolated word syllabification during articulation exercises, without entering meter.
Limitations of automatic analysis
No automatic Spanish syllable counter replaces the poet's ear. Authorial decisions on dieresis, synaeresis, caesura or metric license are intentional and context-dependent. The tool is right on the vast majority of verses but you should review edge cases by hand. To shorten extensive content or measure clarity before analyzing, lean on our text summarizer or the Spanish readability analyzer, which shares the same syllabification engine.
Frequently asked questions about meter and syllables
What is the difference between grammatical and metric syllables?
Grammatical syllables are split word by word as in a dictionary. Metric syllables are counted within a verse applying two extra rules: sinalefa and the final-stress law. The same text can yield different totals in each mode.
What is sinalefa and when does it apply?
It merges the final vowel of one word with the initial vowel of the next, even across silent "h". It is the most important rule of Spanish poetic meter.
How do I tell whether a verse is a hendecasyllable?
It has exactly 11 metric syllables. Paste the verse, switch to Poetry Meter mode and check the auto-label.
Does the final-stress law always add or subtract a syllable?
No. Oxytones add 1, paroxytones add 0, proparoxytones subtract 1, pre-proparoxytones subtract 2 (rare).
When does sinalefa break?
At a medial caesura, deliberate pause, or when the second vowel is a strong tilded vowel and the poet wants to highlight it. Click any ‿ arc in the analysis to disable that specific sinalefa.
Difference between assonant and consonant rhyme?
Consonant matches every sound from the last stressed vowel; assonant matches only the vowels. The tool detects both automatically and reports the percentage of each.
Does the tool detect dieresis and synaeresis?
Not automatically — they are author licenses. You can manually toggle any sinalefa with a click to reproduce a verse with dieresis-style breaking.
Can I analyze a poem in PDF directly?
Yes. Upload a PDF, DOCX or TXT file (up to 10 MB) or drag it onto the editor. All processing happens in your browser.
Start counting syllables and measuring verses
This Spanish syllable counter brings together grammatical syllabification and full metric analysis: sinalefas, final-stress law, verse classification and rhyme scheme — all in your browser, no signup. Paste your poem above and find out whether you are writing perfect octosyllables, classical hendecasyllables, or whether the rhythm is slipping between verses.
Editorial team at Contador de Palabras. Last reviewed: . Rules implemented after Ortografía de la lengua española (RAE, 2010) and Antonio Quilis's Métrica española (1969).