PT Sonnet Rhymes
Calculates rhyme scheme of traditional Portuguese sonnet 14 verses with chosen type.
—
Counting Rhymes in the Portuguese Sonnet
A sonnet (soneto) is a fixed form of 14 verses, usually written in decasyllables (Camonian) or alexandrines (12 syllables). The structure that prevails in Portuguese is the Italian (Petrarchan) sonnet, split into 4-4-3-3 (two quatrains plus two tercets). The Shakespearean (English) sonnet, by contrast, follows 4-4-4-2 (three quatrains and a final couplet). How many distinct rhyme sounds you get depends on the scheme. The classical Petrarchan arrangement ABBA ABBA CDC DCD has 4 distinct rhymes; ABBA ABBA CDE CDE has 5; and the Shakespearean ABAB CDCD EFEF GG has 7.
In Portuguese literature, it was Luís Vaz de Camões (author of Os Lusíadas, 1572) who established the decasyllabic sonnet as a leading lyric form. Several masters followed. Bocage, the pre-Romantic, leaned into satirical and erotic sonnets. Cruz e Sousa, the Brazilian Symbolist, drew on musicality and synesthesia in Broquéis (1893). Olavo Bilac set down the rules of Parnassian rigor, and Vinícius de Moraes kept the 14-verse architecture even as his voice turned modern.
Applications
Literature students reach for this calculator when they analyze sonnets for school exams (ENEM, vestibulares, Cames) and in university criticism courses. Aspiring poets check whether a composition fits a classical scheme before sending it off to a contest or publisher. For editors and anthologists, counting rhymes is one way to sort sonnets by school (Classicism, Arcadism, Romanticism, Parnassianism, Symbolism, Modernism) and to weigh the structural choices made by Camões, Bocage, Cruz e Sousa, and writers working today.
FAQ
What is the most common rhyme scheme in Portuguese sonnets? From Camões onward, the Italian/Petrarchan scheme ABBA ABBA CDC DCD (or CDE CDE) has been the standard, with 4 to 5 distinct rhyme sounds across the 14 verses.
How does the Shakespearean sonnet differ? The English/Shakespearean sonnet runs three quatrains (ABAB CDCD EFEF) and then a heroic couplet (GG). That comes to 7 distinct rhymes, nearly twice as many as the Petrarchan model.
Are all Camonian sonnets in decasyllables? Mostly, yes. Camões fixed the heroic decasyllable (stress on the 6th and 10th syllables) as his standard meter, though now and then he reached for the sapphic decasyllable (stress on 4-8-10) for variety.
Related Tools
Portuguese Classical Sonnet Verses
Calculates total verses in a set of classical Portuguese sonnets.
Number of Reinforcement Layers
Calculate the number of geosynthetic reinforcement layers needed in a reinforced-soil wall or slope, N = H ÷ S_v, from the structure height H (m) and the vertical spacing between layers S_v (m). In a reinforced-soil structure, the geosynthetic layers (geogrid or geotextile) are installed horizontally between compacted soil lifts at regular vertical intervals. The total number of layers is simply the height divided by the spacing. The vertical spacing S_v is a crucial design decision: SMALLER spacing (more layers) better distributes stresses, allows weaker geosynthetics and gives a more homogeneous, stable reinforced mass, but increases installation operations (slower and costlier). LARGER spacing (fewer layers) builds faster but needs stronger geosynthetics and may allow localized deformations between layers (face bulging). Typically S_v ranges 0.3-0.8 m, often adopting multiples of the soil compaction lift thickness (0.15-0.20 m). This calculation is essential for the quantity take-off (total geosynthetic area = N × each layer's area) and budgeting, and defines the construction sequence. Enter the structure height and the vertical spacing.
Actual Plates (Efficiency)
Compute the number of actual plates of a distillation column, N_actual = N_theoretical / (efficiency/100), from the number of theoretical (equilibrium) plates and the column's overall efficiency (%). Since no real plate reaches perfect equilibrium, more actual plates than theoretical are needed: a 50% efficiency doubles the plate count. It is the step that turns the theoretical design into the physical column. Enter the theoretical plates and the overall efficiency.
Wedding Album Photo Count
Estimates number of photos to deliver in a wedding album based on pages and style.
Aedes Mosquitoes per Focus
Estimates the number of Aedes mosquitoes emerging per focus.
Elenbaas Number
Computes the Elenbaas number of a channel formed by two heated vertical parallel plates, El = g·β·ΔT·b⁴ ÷ (ν·α·H), which is the Rayleigh number based on the plate spacing b multiplied by the ratio b/H. It governs natural convection in finned heat sinks, electronics enclosures and solar collectors: a very small El means a narrow, tall channel where the boundary layers merge and choke the flow, while a large El means the plates behave as isolated. The spacing that maximises a heat sink's total dissipation falls near El ≈ 46 for isothermal plates, a classic natural-convection fin design criterion. Gravity is taken as 9.80665 m/s², β is the fluid thermal expansion coefficient and H the plate height. Enter the expansion coefficient, the temperature difference, the spacing, the kinematic viscosity, the thermal diffusivity and the plate height.
The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.