When you start learning Italian, you quickly discover that words change depending on whether they are singular or plural: un libro – due libri, una pizza – due pizze. Unlike English, we do not normally add an -s; instead, we change the final vowel.
In this article, you will find the main rules for forming the plural in Italian, some common spelling changes and the most useful exceptions. You do not need to memorise everything at once: the important thing is to recognise the basic patterns and learn to apply them gradually.
How to form the plural in Italian
In Italian, the plural is mainly formed by changing the ending of the noun. To choose the correct ending, we need to consider the gender of the word and its final vowel.
The three most important rules are:
- masculine nouns ending in -o form the plural in -i;
- feminine nouns ending in -a form the plural in -e;
- masculine and feminine nouns ending in -e form the plural in -i.
Let us look at each case with some examples.
Masculine nouns ending in -o
Most masculine nouns ending in -o change this vowel to -i:
- un libro – due libri;
- un ragazzo – due ragazzi;
- un gelato – due gelati;
- un tavolo – due tavoli.
Therefore, the Italian plural of libro is not libros, but libri.
Feminine nouns ending in -a
Most feminine nouns ending in -a form the plural in -e:
- una casa – due case;
- una pizza – due pizze;
- una ragazza – due ragazze;
- una finestra – due finestre.
Nouns ending in -e
Nouns ending in -e can be masculine or feminine, but they usually form the plural in -i:
- un ristorante – due ristoranti;
- un esame – due esami;
- una lezione – due lezioni;
- una chiave – due chiavi.
Because the ending -e does not always indicate gender, it is best to learn these words with their article: il ristorante, l’esame, la lezione, la chiave.
Masculine nouns ending in -a
Although the ending -a is usually associated with feminine nouns, some masculine nouns end in -a and form the plural in -i:
- il problema – i problemi;
- il programma – i programmi;
- il turista – i turisti.
This is why it is important not to assume automatically that every word ending in -a is feminine.
Some common spelling changes
In certain words, the spelling changes slightly to preserve the pronunciation:
- amica – amiche;
- barca – barche;
- spiaggia – spiagge;
- arancia – arance;
- camicia – camicie.
These changes do not all follow one simple pattern. For now, the most useful approach is to notice them when they appear and remember each word together with its plural.
Words that do not change in the plural
Not all Italian nouns change their ending. Some words remain the same in the singular and plural.
Words ending in a stressed vowel
- un caffè – due caffè;
- una città – due città;
- un’università – due università
Foreign words ending in a consonant
- un bar – due bar;
- un computer – due computer;
- un film – due film
Abbreviated words
- una foto – due foto;
- una moto – due moto;
- un’auto – due auto.
The article, numbers and the rest of the sentence tell us whether these words are singular or plural.
Articles and adjectives change too
When a noun becomes plural, the articles and adjectives that accompany it must also agree in gender and number:
- il ragazzo italiano – i ragazzi italiani;
- la ragazza italiana – le ragazze italiane;
- lo studente simpatico – gli studenti simpatici;
- la lezione interessante – le lezioni interessanti.
Therefore, changing the noun alone is not enough. All the related elements must agree:
❌ le ragazza italiana
✅ le ragazze italiane
Adjectives ending in -o normally have four forms: italiano, italiana, italiani, italiane. By contrast, many adjectives ending in -e have one singular form and a plural form in -i: interessante – interessanti.
Some irregular plurals
Some nouns form their plural irregularly:
- uomo – uomini;
- uovo – uova;
- braccio – braccia.
These cases do not follow a single rule and are best learned gradually, in real sentences and situations. You do not need to memorise long lists to start using the most common plurals correctly.
Common mistakes with the Italian plural
Adding an -s as in English
In Italian, we normally change the final vowel:
❌ due libros
✅ due libri
Changing an invariable word
Words such as città, film and foto remain unchanged:
❌ due cittàs
✅ due città
Changing the noun but not the article or adjective
❌ le ragazze italiana
✅ le ragazze italiane
Learn to use the Italian plural with confidence
Knowing the main endings is a good starting point, but using them correctly while speaking takes practice. You also need to learn the gender of each word, recognise exceptions and make articles, nouns and adjectives agree.
In my individual online Italian lessons, we will practise these rules through conversations and real-life situations, with explanations and corrections tailored to your level. This will help you stop thinking constantly about every ending and start using the plural more naturally.
