Learning Finnish numbers follows a highly logical system once you understand the basic rules.

You only need to memorize the first ten numbers to easily build much larger ones.

This guide covers how to count in Finnish from zero to millions.

I’ll also explain the specific grammar rules for combining numbers with nouns.

Let’s look at how both written and spoken Finnish handle counting.

Numbers 1 to 10 in Finnish

The foundation of the entire Finnish counting system relies on the numbers zero through ten.

Once you learn these base words, constructing higher numbers becomes a simple formula.

Here are the base numbers you need to memorize.

Numbers 11 to 19

Creating numbers from eleven to nineteen in Finnish is incredibly straightforward.

You simply take the base number from 1 to 9 and add the suffix -toista to the end.

The word toista literally translates to “of the second”, implying the second set of ten.

Counting by tens (20, 30, 40…)

To count by tens in Finnish, you’ll use the suffix -kymmentä.

This suffix is just the partitive case form of the word kymmenen (ten).

You attach it directly to the base numbers.

Compound numbers from 21 to 99

Building compound numbers like 21 or 55 requires you to combine the ten and the unit.

You do this by writing the entire number as one single word.

No spaces or hyphens are used in written Finnish for these numbers.

For example, to say 21, you combine kaksikymmentä (20) and yksi (1).

This gives you the word kaksikymmentäyksi.

Here are a few more examples of compound numbers.

Hundreds, thousands, and beyond

The Finnish word for 100 is sata.

The word for 1,000 is tuhat.

To express multiples of hundreds or thousands, you apply a similar grammar rule as we did with the tens.

You use the base number followed by the partitive form of hundred (-sataa) or thousand (-tuhatta).

To read out a large number, you string all the parts together into a long word.

For example, 153 is sataviisikymmentäkolme.

Spoken Finnish vs. written Finnish numbers

What I’ve explained so far is the official, written standard Finnish (kirjakieli).

However, spoken Finnish (puhekieli) heavily abbreviates numbers in daily conversation.

If you visit Finland, you’ll rarely hear people say the full word kaksikymmentäyksi.

Instead, Finns drop letters and syllables to speak much faster.

Here are the most common spoken forms of the base numbers.

When counting by tens, the suffix -kymmentä is usually shortened to just -kytä or -kyt.

For example, the spoken version of 20 (kaksikymmentä) is usually pronounced as kakskytä or kakskyt.

So, 21 in casual conversation sounds like kakskytäyks.

Using numbers with nouns (partitive case)

This is the most critical grammar rule to remember about Finnish numbers.

Whenever you use a number greater than one, the noun that follows it must be in the partitive singular case.

If the number is one (yksi), the noun stays in its basic nominative case.

Because the number is higher than one in the next example, the word auto changes to autoa.

This rule applies consistently to all objects you count.

Even when dealing with a massive number like one thousand, the noun remains in the partitive singular.

If the sentence uses an adjective alongside the number, the adjective must also take the partitive singular ending.