French Numbers 1 to 100
French numbers are straightforward from 1 to 69 — but then the system takes a fascinating turn. From 70 onward, France uses a base-20 (vigesimal) counting system inherited from the ancient Celts, which means 70 is literally "sixty-ten" and 80 is "four-twenties." This complete guide walks you through every number from 1 to 100 with pronunciation and the patterns that make them easier to remember.
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Numbers 1-10: The Foundation
Every French number builds on these ten core words. Memorize them first — they are the building blocks for everything that follows.
The pronunciation of cinq, six, huit, and dix changes depending on what follows. Before a consonant, the final consonant is often silent: cinq livres sounds like "san lee-vruh." Before a vowel or when standalone, you pronounce the final sound.
Numbers 11-20: Unique Words to Memorize
The numbers 11 through 16 each have their own unique form. Starting at 17, French switches to a compound pattern (dix-sept = ten-seven). This is similar to English, where "eleven" and "twelve" are unique but "thirteen" follows a pattern.
Numbers 21-69: The Easy Pattern
From 21 to 69, French numbers follow a predictable pattern: the tens word plus the units word, joined by a hyphen. The only special rule is that when the units digit is 1, you add et (and) instead of a hyphen: vingt et un (21), trente et un (31), and so on.
Notice the pattern for the tens: trente (30), quarante (40), cinquante (50), soixante (60) — they all end in -ante or -onte. This consistency makes them easier to remember as a group.
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Numbers 70-79: The Vigesimal Twist Begins
Here is where French gets interesting. Instead of having a unique word for 70, French uses soixante-dix — literally "sixty-ten." The numbers 71-79 continue this pattern: 71 is soixante et onze (sixty-and-eleven), 72 is soixante-douze (sixty-twelve), and so on up to 79 (soixante-dix-neuf, sixty-nineteen).
Numbers 80-89: Four Twenties
Quatre-vingts literally means "four twenties" (4 x 20 = 80). This is the most famous example of the vigesimal system in French. Note the spelling: quatre-vingts with an s when it stands alone, but quatre-vingt-un (81) drops the s when followed by another number.
Unlike 21, 31, 41, etc., the number 81 does not use et. It is quatre-vingt-un, not quatre-vingt-et-un. The same applies to 91 (quatre-vingt-onze).
Numbers 90-100: The Final Stretch
Quatre-vingt-dix means "four-twenty-ten" (4 x 20 + 10 = 90). The numbers 91-99 combine quatre-vingt with 11-19: 91 is quatre-vingt-onze (four-twenty-eleven), 92 is quatre-vingt-douze (four-twenty-twelve), and so on.
Understanding the Vigesimal System
The base-20 counting system in French (70-99) traces back to the Celtic tribes of ancient Gaul, who counted in groups of twenty. When Latin replaced Gaulish, most of the number system switched to base 10, but the old Celtic pattern survived for the higher numbers.
This is why the math works like this:
- 70 = 60 + 10 → soixante-dix
- 75 = 60 + 15 → soixante-quinze
- 80 = 4 x 20 → quatre-vingts
- 85 = 4 x 20 + 5 → quatre-vingt-cinq
- 90 = 4 x 20 + 10 → quatre-vingt-dix
- 99 = 4 x 20 + 19 → quatre-vingt-dix-neuf
Belgian and Swiss French: The Simpler Alternative
If the vigesimal system seems daunting, know that Belgian and Swiss French speakers use a straightforward decimal system for these numbers:
- 70 = septante (Belgium, Switzerland)
- 80 = huitante or octante (parts of Switzerland)
- 90 = nonante (Belgium, Switzerland)
These forms are perfectly correct French and widely understood, though using them in France might get you a smile and a comment about your accent.
A quick way to practice: read prices aloud when shopping online on French websites. A product costing 87 euros forces you to say quatre-vingt-sept euros — real-world repetition is the fastest path to fluency with numbers.
Key Spelling Rules for French Numbers
French number spelling has a few rules worth noting:
- Hyphens: Since the 1990 spelling reform, all compound numbers use hyphens: vingt-et-un, trois-cent-quarante-cinq. Older texts may omit some hyphens.
- Quatre-vingts vs. quatre-vingt-: The s on vingts only appears when 80 stands alone or ends a number. It drops when followed by another digit.
- Cent: Similarly, cents takes an s when it is a round multiple (200 = deux cents) but loses it when followed by more digits (201 = deux cent un).
Frequently Asked Questions
Why does French use a base-20 (vigesimal) system for numbers 70-99?
The vigesimal system in French is a remnant of the Celtic languages spoken in Gaul before Latin took over. The Celts counted in base 20, and this influence survived in French for the numbers 70-99. Belgian and Swiss French use septante (70), octante/huitante (80), and nonante (90) instead, which follow the simpler decimal pattern.
How do you say phone numbers in French?
In France, phone numbers are given in pairs. For example, 06 12 34 56 78 is spoken as zéro six, douze, trente-quatre, cinquante-six, soixante-dix-huit. Each two-digit group is read as a single number, not digit by digit.
What is the difference between "soixante-dix" and "septante"?
Soixante-dix (literally "sixty-ten") is used in France and means 70. Septante also means 70 and is used in Belgium, Switzerland, and parts of Africa. Both are correct French — the difference is purely regional.
Why does "quatre-vingts" have an S but "quatre-vingt-un" does not?
Quatre-vingts (80) takes an s because it stands alone as a round number (literally "four twenties"). When followed by another number — like quatre-vingt-un (81) — the s is dropped. This is a spelling rule, not a pronunciation difference.
What is the easiest way to memorize French numbers?
Start with 1-20, since these are all unique words. Then learn the tens (30, 40, 50, 60) because the pattern is consistent: add the digits 1-9 after the tens word. Finally, tackle 70-99 separately by understanding the base-20 math: 70 = 60+10, 80 = 4x20, 90 = 4x20+10. Practice with prices, phone numbers, and addresses in daily life.