Italian Numbers from 1 to 100: Number System, Common Pitfalls & Tips

In this guide, you'll find practical rules, common pitfalls, and examples for Italian numbers.

Italienische Flagge Numfred

How Italian Numbers Are Structured

The Italian number system is logical and systematic, but has some unique features in spelling and pronunciation.

1-10

Basic numbers: uno, due, tre, quattro, cinque, sei, sette, otto, nove, dieci

These basic numbers must be memorized. They form the foundation for all other numbers.

11-16

Ending in "-dici": undici, dodici, tredici, quattordici, quindici, sedici

Numbers from 11 to 16 are formed by placing the unit digit (with slight modifications) before ten (dieci), resulting in the "-dici" ending.

17-19

Starting with "dici-/dicia-": diciassette, diciotto, diciannove

Here ten is placed first: dieci + sette/otto/nove (in diciotto a vowel is dropped).

20-99

Tens + units: ventuno, trentadue, sessantotto

Numbers are written as one word. When the unit begins with a vowel (uno, otto), the final vowel of the tens digit is dropped: venti + uno → ventuno. When the unit ends in -tre, an accent is added: ventitré.

100

One hundred: cento

101+

Combined without "and": centouno, duecentoventicinque

Numbers are simply attached to cento without a connecting word.

Italian Numbers from 1 to 100

Complete overview of all Italian numbers from 1 to 100. Perfect for systematic learning and quick reference.

1
uno
2
due
3
tre
4
quattro
5
cinque
6
sei
7
sette
8
otto
9
nove
10
dieci
11
undici
12
dodici
13
tredici
14
quattordici
15
quindici
16
sedici
17
diciassette
18
diciotto
19
diciannove
20
venti

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Hundreds, Thousands and Large Numbers

Italian numbers are written as one word. For large numbers, a period is used as a thousands separator.

100

cento

1,000

mille

Special feature: In plural, mille becomes mila.
duemila (2,000), tremila (3,000) etc.

1,000,000

un milione

1,000,000,000

un miliardo

1,000,000,000,000

un bilione

Common Pitfalls When Learning Numbers

Hearing or quickly pronouncing numbers can be challenging. These cases often lead to confusion:

  • Dropping the final vowel (Elision):
    With the numbers uno and otto, the final vowel of the tens digit is dropped. It's ventuno (not ventiuno) and quarantotto (not quarantaotto).
  • Accent on three:
    All numbers ending in -tre get an accent: ventitré, trentatré, quarantatré etc. This affects the stress pattern.
  • Writing as one word:
    Italian numbers up to 100 are always written as a single word. For example: settantacinque (75), novantanove (99).

Understanding and Using Numbers in Daily Life

In spoken Italian, numbers are often pronounced quickly – especially when dealing with:

  • Time:
    Sono le tre e un quarto (It's quarter past three)
    Sono le cinque meno dieci (It's ten to five)
    È l'una (It's one o'clock)
  • Money amounts:
    sette e ottantanove = 7.89 €
  • Years:
    1999 → millenovecentonovantanove (as one word)
    2012 → duemiladodici
    2025 → duemilaventicinque
  • Quantities:
    un paio di centinaia (a few hundred)
    un migliaio (about a thousand)
  • Basic arithmetic:
    3 + 7 = 10 → tre più sette fa dieci
    8 - 5 = 3 → otto meno cinque fa tre
    6 × 3 = 18 → sei per tre fa diciotto
    12 ÷ 4 = 3 → dodici diviso quattro fa tre
  • Fractions and decimals:
    ½ → un mezzo
    ¼ → un quarto
    8.21 → otto virgola ventuno

Unique Features of Italian Numbers

Italian has certain linguistic conventions and peculiarities when dealing with numbers. Here's an overview of typical characteristics:

  • One word, no hyphens:
    In Italian, compound numbers are written as a single word, e.g. quarantacinque (45). Unlike English, which uses hyphens (e.g. forty-five), Italian follows the same pattern as German in writing numbers as one continuous word.
  • Changing thousands:
    The word for 1,000 is mille. In plural, however, it becomes mila: duemila (2,000), tremila (3,000). The word cento (100) remains unchanged.
  • Adaptation of "uno":
    The number uno behaves like the indefinite article. Before a masculine noun it becomes un (e.g. un anno), unless the word begins with s+consonant, z, y, x, gn, ps (then uno). Before feminine nouns it becomes una or un' before a vowel.
  • Lowercase number words:
    Number words are written in lowercase in Italian – except at the beginning of a sentence.

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