French Numbers 70, 80 & 90 Explained | Meridian French

Estimated Keyword Difficulty: Low (KD ~8–14)

Introduction

You're learning French vocabulary. You memorise un, deux, trois, quatre, cinq and feel good about it. Then you hit 70. And everything falls apart.

Why is 70 soixante-dix (literally "sixty-ten")? Why is 80 quatre-vingts ("four-twenties")? Why is 99 quatre-vingt-dix-neuf — literally "four-twenty-ten-nine"?

French numbers are genuinely one of the most baffling aspects of the language for English-speaking learners. But there's a logic to them — rooted in history — and with the right explanation, they become much easier to learn than they first appear.

This guide covers the entire French number system, from 1 to 1,000,000,000, with a clear explanation of the quirks at 70, 80, and 90, tips for how to remember them, and a note on the regional variations that make things (slightly) easier in Belgium and Switzerland.

Numbers 1–20: Just Memorise These

The first twenty numbers in French simply have to be memorised — there's no logic that helps you derive them. Here they are:

Notice that 17, 18, and 19 are already compound: dix-sept = ten-seven, dix-huit = ten-eight, dix-neuf = ten-nine. This pattern will reappear later.

Pronunciation note on vingt: The final -gt in vingt is normally silent, but when used in compounds (21–29), you pronounce it slightly: vingt et un → "van-tay-un."

Numbers 21–69: The Regular Zone

From 21 to 69, French numbers follow a fairly predictable pattern — much like English:

• vingt et un (21) — "twenty and one"
• vingt-deux (22) — "twenty-two"
• vingt-trois (23) — "twenty-three"
• ...
• trente (30), trente et un (31), trente-deux (32)...
• quarante (40), quarante et un (41)...
• cinquante (50), cinquante et un (51)...
• soixante (60), soixante et un (61)...

Key tens:

• 20 = vingt
• 30 = trente
• 40 = quarante
• 50 = cinquante
• 60 = soixante

Notice that for 21, 31, 41, 51, and 61, French uses et un (and one): vingt et un, trente et un, quarante et un. For all other numbers in the sequence, you simply hyphenate: vingt-deux, trente-trois, etc.

This is all very manageable. The trouble begins at 70.

The Famous Problem: 70, 80, and 90

Why Does This Happen?

French numbers from 70 onwards use a vigesimal (base-20) counting system — a legacy of older Celtic and Gaulish counting traditions that influenced the French spoken in France. This is why you see "sixty-ten" and "four-twenties" instead of straightforward "seventy" and "eighty."

Interestingly, modern French only partially kept this system. Some Francophone regions (Belgium, Switzerland, parts of Canada) use simpler forms. But in France itself, the unusual forms are standard.

70–79: "Sixty-something"

In France, there is no word for "seventy." Instead, 70 is built on top of 60 (soixante):

• 70 = soixante-dix (sixty-ten)
• 71 = soixante et onze (sixty and eleven)
• 72 = soixante-douze (sixty-twelve)
• 73 = soixante-treize (sixty-thirteen)
• 74 = soixante-quatorze
• 75 = soixante-quinze
• 76 = soixante-seize
• 77 = soixante-dix-sept (sixty-ten-seven)
• 78 = soixante-dix-huit
• 79 = soixante-dix-neuf

So you're essentially counting: 60+10, 60+11, 60+12... 60+19.

80–89: "Four-twenties"

There is no French word for "eighty" in standard France French. Instead, 80 is literally "four-twenties":

• 80 = quatre-vingts (four-twenties)
• 81 = quatre-vingt-un (four-twenty-one)
• 82 = quatre-vingt-deux
• 83 = quatre-vingt-trois
• ...
• 89 = quatre-vingt-neuf

Important note: quatre-vingts (80 alone) has an -s at the end. But when followed by another number, the -s drops: quatre-vingt-un (no -s), quatre-vingt-deux (no -s).

90–99: "Four-twenty-ten-something"

And now the infamous nineties:

• 90 = quatre-vingt-dix (four-twenty-ten)
• 91 = quatre-vingt-onze (four-twenty-eleven)
• 92 = quatre-vingt-douze
• 93 = quatre-vingt-treize
• 94 = quatre-vingt-quatorze
• 95 = quatre-vingt-quinze
• 96 = quatre-vingt-seize
• 97 = quatre-vingt-dix-sept (four-twenty-ten-seven)
• 98 = quatre-vingt-dix-huit
• 99 = quatre-vingt-dix-neuf

Yes, 99 is literally "four-twenty-ten-nine." It's a mouthful — but once you've made peace with the system, it actually becomes automatic.

The Belgium and Switzerland Alternative

Here's the good news for anyone who finds 70, 80, and 90 maddening: Belgium, Switzerland, and parts of Canada use simpler forms.

Septante, huitante/octante, nonante — these are straightforward, logical words, and many French learners hear about them and wish they were universal. They're not used in France itself, but understanding them helps with Francophone media, communication, and travel to Switzerland or Belgium.

Numbers 100 and Above

Hundreds

• 100 = cent
• 101 = cent un
• 200 = deux cents
• 201 = deux cent un
• 300 = trois cents
• 500 = cinq cents

Spelling rule: cent takes an -s when it stands alone as a round number (deux cents, trois cents) but loses the -s when followed by another number (deux cent un, trois cent cinquante).

Thousands

• 1,000 = mille
• 2,000 = deux mille
• 10,000 = dix mille
• 100,000 = cent mille
• 1,000,000 = un million
• 1,000,000,000 = un milliard

Important: Mille never takes an -s. It's always mille whether you say 2,000 (deux mille) or 5,000 (cinq mille).

Million and milliard do take -s in the plural: deux millions, trois milliards.

Practical large numbers:

• 1,500 = mille cinq cents or quinze cents
• 2,450 = deux mille quatre cent cinquante
• 1,000,000 = un million
• 7,500,000 = sept millions cinq cent mille

Ordinal Numbers (First, Second, Third...)

Ordinal numbers (used for ranking and order) follow a regular pattern in French:

Take the cardinal number, remove any final -e, and add -ième:

• 1st = premier / première (irregular — not unième)
• 2nd = deuxième (or second / seconde)
• 3rd = troisième
• 4th = quatrième
• 5th = cinquième
• 6th = sixième
• 7th = septième
• 8th = huitième
• 9th = neuvième (note the v: neuf → neuvième)
• 10th = dixième
• 20th = vingtième
• 100th = centième

Ordinals agree in gender and number like adjectives:

• le premier étage — the first floor (masculine)
• la première fois — the first time (feminine)
• les troisièmes résultats — the third results (plural)

Fractions and Decimals

Common fractions:

• 1/2 = un demi (half)
• 1/3 = un tiers (a third)
• 1/4 = un quart (a quarter)
• 3/4 = trois quarts
• 2/3 = deux tiers

For other fractions, use the ordinal form: 1/5 = un cinquième, 1/8 = un huitième.

Decimals:

France uses a comma as the decimal separator (not a period):

• 3.14 is written and said: 3,14 → trois virgule quatorze (three comma fourteen)
• 2.5 = deux virgule cinq

This catches many English speakers off guard. In French written text, the comma in a number is a decimal point, and a period or space is used as the thousands separator.

How to Remember 70, 80, 90: Practical Tips

1. Build a "bridge" with the logic

Once you understand that French counts from 60 for the seventies and from 4×20 for the eighties and nineties, you can always reconstruct any number. Instead of memorising soixante-dix-neuf as a fixed unit, you think: "60 + 19 = 79. Soixante + dix-neuf = soixante-dix-neuf." It's a formula.

2. Use mnemonic associations

• soixante-dix → "sixty-dix" — imagine a Dixie cup on top of a sixty-year-old man
• quatre-vingts → "four-twenties" — imagine four calendar pages each showing the number 20

3. Practise with phone numbers and prices

French phone numbers are written in pairs (06 XX XX XX XX) — practise reading them aloud. French prices are often in the seventies and eighties range (€75, €89). Use these real-world encounters to drill the numbers.

4. Use Anki

Create flashcard pairs: one side shows the number in digits (75), the other shows the French (soixante-quinze). Drill both directions: numeral → French and French → numeral.

5. Dictation exercises

Have a French audio source read numbers, and write them down as digits. This is one of the most practical listening exercises you can do — and it's genuinely useful for understanding prices, addresses, and dates.

Numbers in Context: Dates, Times, Ages

Dates

French dates follow the format day/month/year:

• 5 January 2026 → le cinq janvier deux mille vingt-six
• 14 July (Bastille Day) → le quatorze juillet

Days of the month use cardinal numbers (not ordinal) in French — except for the 1st, which is le premier:

• le premier mai (1st May)
• le cinq mai (5th May)
• le vingt et un juin (21st June)

Time

French uses the 24-hour clock formally (e.g., in train stations, official communication):

• 14h30 = quatorze heures trente (2:30 pm)
• 21h15 = vingt et une heures quinze (9:15 pm)

Informally, the 12-hour clock is also used, typically with du matin (in the morning) or du soir (in the evening):

• trois heures du matin — 3am
• huit heures du soir — 8pm

Ages

French expresses age using avoir (to have), not être (to be):

• J'ai vingt-cinq ans. — I am 25. (Literally: I have 25 years.)
• Il a soixante-dix ans. — He is 70.

Phone Numbers and Prices: Real-World Practice

Phone numbers in France are 10-digit numbers grouped in pairs:

• 06 12 34 56 78 → zéro six, douze, trente-quatre, cinquante-six, soixante-dix-huit

Practising French phone numbers is one of the best drills for numbers in the 70–90 range — especially since many numbers will include soixante-dix or quatre-vingt.

Prices regularly fall in the tricky range:

• €72 = soixante-douze euros
• €85 = quatre-vingt-cinq euros
• €98 = quatre-vingt-dix-huit euros

Next time you're in a French context — whether a website, a film, or an actual shop in France — pay attention to the numbers and practise saying them aloud.

Summary: French Numbers at a Glance

Conclusion

French numbers are quirky, historically fascinating, and — once you understand the underlying logic — entirely learnable. The key insight is that 70–99 use a base-20 counting system, not the base-10 system you're used to from English. Once that clicks, you can generate any number from 70–99 as a formula rather than trying to memorise each one individually.

Spend a week drilling numbers daily — phone numbers, prices, ages, dates — and they'll quickly become automatic. The famous quatre-vingt-dix-neuf will roll off your tongue before you know it.

Bonne chance avec les chiffres! 🔢🇫🇷