Spanish
Readability
Score the readability of any Spanish text
The Crawford Score for Spanish Texts
The Crawford Score, developed by Alan N. Crawford in 1989, calculates the grade level needed to understand Spanish text.
Grade level = ( - 0.205 * # sentences/100 words) + (# of syllables/100 words x 0.049) - 3.407
Crawford chose two key factors for his study: the average length of sentences and the number of syllables in 100 words. He studied passages from elementary readers popular in the United States, Latin America, and Spain, each tailored to a specific grade level. By calculating the average and variation of these factors and using multiple regression analysis, he linked these textual features to appropriate grade levels. The formula is valid up to 6th grade.

You can match the score to this table:

Score U.S. Grade Level Spain's Equivalent Student Age
1 1st Grade 1º Primaria (Primero) 6-7 years
2 2nd Grade 2º Primaria (Segundo) 7-8 years
3 3rd Grade 3º Primaria (Tercero) 8-9 years
4 4th Grade 4º Primaria (Cuarto) 9-10 years
5 5th Grade 5º Primaria (Quinto) 10-11 years
6 6th Grade 6º Primaria (Sexto) 11-12 years
7 7th Grade 1º ESO 12-13 years
8 8th Grade 2º ESO 13-14 years
9 9th Grade (Freshman) 3º ESO 14-15 years
10 10th Grade (Sophomore) 4º ESO 15-16 years
11 11th Grade (Junior) 1º Bachillerato 16-17 years
12 12th Grade (Senior) 2º Bachillerato 17-18 years
13 College Universidad (University) 18+ years