Ordinal Numbers in Finnish

In Brief

Finnish ordinal numbers show position in an order: ensimmäinen “first,” toinen “second,” kolmas “third,” and neljäs “fourth.” They behave much like adjectives, so their endings normally change to match the noun: kolmas kerros “third floor,” but kolmannessa kerroksessa “on the third floor.” A full stop after a digit marks an ordinal in writing: 3. kerros means kolmas kerros.

Overview

Ordinal numbers answer the question “which one in a sequence?” English uses forms such as first, second, and third; Finnish calls the whole group järjestysluvut, “order numbers.” You need them for dates, floors, school grades, competitions, chapters, anniversaries, and occasions counted in sequence.

This is an A1 topic because the most frequent forms occur in very ordinary phrases: ensimmäinen kerta “the first time,” toinen bussi “the second bus,” and kolmas toukokuuta “the third of May.” The basic idea is easy: learn the ordinal as a word and place it before the noun it describes.

The major difference from English is that Finnish uses cases (word endings that express roles and meanings such as “in,” “from,” “to,” or “as”). An ordinal generally takes the same case as its noun. As a result, memorising only kolmas is not enough for every sentence: you will also meet kolmannen, kolmatta, kolmannessa, and kolmanneksi. Begin with the basic forms and common chunks; the fuller system becomes manageable once you recognise the changing stem.

How It Works

The first ten

The first three ordinals must be learned as individual vocabulary. From four onward, the relationship with the cardinal number is easier to see, but the endings and stems still deserve attention.

Number	Cardinal	Ordinal	English
1	yksi	ensimmäinen	first
2	kaksi	toinen	second
3	kolme	kolmas	third
4	neljä	neljäs	fourth
5	viisi	viides	fifth
6	kuusi	kuudes	sixth
7	seitsemän	seitsemäs	seventh
8	kahdeksan	kahdeksas	eighth
9	yhdeksän	yhdeksäs	ninth
10	kymmenen	kymmenes	tenth

Ensimmäinen and toinen end in -nen, like many Finnish adjectives. Kolmas through kymmenes have nominative forms ending mainly in -s. The nominative is the basic dictionary form, used when no other case ending is required.

Agreement with the noun

An ordinal placed before a noun acts like an adjective. It normally agrees with that noun in both number and case: both words receive forms that fit the sentence.

Meaning	Finnish	What changes
the third floor	kolmas kerros	both words in the basic form
on the third floor	kolmannessa kerroksessa	both in the “in” case
from the third floor	kolmannesta kerroksesta	both in the “from inside” case
to the third floor	kolmanteen kerrokseen	both in the “into” case
in third grade	kolmannella luokalla	both in the “on/at” case
for the third time	kolmannen kerran	both in a genitive construction

English can leave third unchanged in all these phrases. Finnish cannot. Do not simply attach a case ending to the visible nominative form: kolmas + ssa does not produce the correct word. You need the appropriate stem.

Useful case forms

A stem is the part of a word to which endings are attached. The following forms cover many everyday needs and reveal the main changes. The labels are less important at first than the phrases and meanings.

Basic form	Genitive (“of”; also many complete-object phrases)	Partitive (“some/part of”)	Inessive (“in”)	Illative (“into”)
ensimmäinen	ensimmäisen	ensimmäistä	ensimmäisessä	ensimmäiseen
toinen	toisen	toista	toisessa	toiseen
kolmas	kolmannen	kolmatta	kolmannessa	kolmanteen
neljäs	neljännen	neljättä	neljännessä	neljänteen
viides	viidennen	viidettä	viidennessä	viidenteen
kuudes	kuudennen	kuudetta	kuudennessa	kuudenteen
seitsemäs	seitsemännen	seitsemättä	seitsemännessä	seitsemänteen
kahdeksas	kahdeksannen	kahdeksatta	kahdeksannessa	kahdeksanteen
yhdeksäs	yhdeksännen	yhdeksättä	yhdeksännessä	yhdeksänteen
kymmenes	kymmenennen	kymmenettä	kymmenennessä	kymmenenteen

Several patterns are worth noticing:

• ensimmäinen → ensimmäisen and toinen → toisen follow the common -nen → -sen change.
• kolmas → kolmannen has -nnen in the genitive and several related forms.
• Ordinals from neljäs onward likewise commonly show -nnen: neljännen, viidennen, kuudennen.
• The partitive often has -tta/-ttä: kolmatta, neljättä, viidettä.
• Motion “into” commonly has -nteen: kolmanteen, neljänteen, viidenteen.

Vowel harmony determines whether an ending contains a or ä. Compare kolmatta but neljättä. It is safer to learn a few high-frequency complete forms than to guess from the English translation.

Dates

A date written with a full stop after the day number treats that number as an ordinal:

• 3. toukokuuta — kolmas toukokuuta — “the third of May”
• 1. tammikuuta — ensimmäinen tammikuuta — “the first of January”
• 22. kesäkuuta — kahdeskymmenestoinen kesäkuuta — “the twenty-second of June”

The month appears in the partitive: toukokuu “May” becomes toukokuuta, and tammikuu “January” becomes tammikuuta. The word päivä “day” is normally omitted. In fully numeric dates, 3.5. means 3 May, following day–month order—not March 5.

Ordinals from 11 onward

The teens have special but regular historical forms. Learn them as units:

Number	Finnish ordinal	English
11	yhdestoista	eleventh
12	kahdestoista	twelfth
13	kolmastoista	thirteenth
19	yhdeksästoista	nineteenth
20	kahdeskymmenes	twentieth
30	kolmaskymmenes	thirtieth
100	sadas	hundredth
1,000	tuhannes	thousandth

In compound ordinals, each numeral component is ordinal and the entire expression is written as one word. Thus 21st is kahdeskymmenesensimmäinen, literally a sequence of “twentieth” and “first”; 22nd is kahdeskymmenestoinen. These long written forms are correct, although digits are often much easier to read in practical texts.

Digits and the ordinal full stop

Finnish marks an ordinal digit with a full stop:

• 1. = ensimmäinen
• 2. = toinen
• 3. = kolmas
• 10. = kymmenes

That dot carries meaning. Compare 3 kerrosta “three floors” with 3. kerros “third floor.” In dates and headings, the dot is not merely sentence punctuation, so it remains even when another punctuation mark follows according to the surrounding sentence.

Examples in Context

Finnish	English	Note
Tämä on ensimmäinen kertani Suomessa.	This is my first time in Finland.	Ensimmäinen in the basic form
Odotan toista bussia.	I’m waiting for the second bus.	Partitive toista after odottaa
Kolmas toukokuuta on tiistai.	The third of May is Tuesday.	Date expression
Olen kolmannella luokalla.	I’m in third grade.	Both words have -lla
Asumme neljännessä kerroksessa.	We live on the fourth floor.	Both words have the inessive -ssa
Hissi menee viidenteen kerrokseen.	The lift goes to the fifth floor.	Motion into/to a floor
Hän voitti ensimmäisen palkinnon.	She won first prize.	Genitive-marked complete object
Suomi tuli kilpailussa toiseksi.	Finland finished second in the competition.	-ksi expresses the resulting position
Tämä on jo kolmas kerta.	This is already the third time.	Common basic phrase
Yritän kolmannen kerran.	I’ll try for the third time.	kolmannen kerran is a fixed useful pattern
Lue kirjan kuudes luku.	Read the sixth chapter of the book.	Basic form before the object noun
Kokous on 12. syyskuuta.	The meeting is on 12 September.	The digit is read kahdestoista
Hän täyttää kahdeksantoista vuotta, mutta tämä on hänen kahdeksastoista syntymäpäivänsä.	She is turning eighteen, but this is her eighteenth birthday.	Cardinal kahdeksantoista versus ordinal kahdeksastoista
Juoksija oli maalissa seitsemäs.	The runner was seventh at the finish.	Ordinal used without a following noun

Common Mistakes

Using a cardinal where an ordinal is needed

• Wrong: kolme kerros for “third floor”
• Right: kolmas kerros
• Why: Kolme counts three items; kolmas identifies one item’s position. Also remember that “three floors” is kolme kerrosta, with the noun in the partitive.

Leaving the ordinal unchanged

• Wrong: Asun kolmas kerroksessa.
• Right: Asun kolmannessa kerroksessa.
• Why: The ordinal and noun agree. Because kerroksessa means “on/in the floor,” kolmas must also take the inessive form kolmannessa.

Building cases directly from the dictionary form

• Wrong: kolmassessa, viidessä when you mean “in the third/fifth”
• Right: kolmannessa, viidennessä
• Why: The -s visible in kolmas and viides is not the stem used before most case endings. Learn kolmannen and viidennen as gateway forms.

Omitting the dot after an ordinal digit

• Wrong: 3 kerros
• Right: 3. kerros
• Why: Without the dot, 3 is cardinal “three.” The dot changes it to “third.”

Using the month’s basic form in a date

• Wrong: kolmas toukokuu
• Right: kolmas toukokuuta
• Why: In the standard date expression, the month is partitive. Learn month pairs such as toukokuu → toukokuuta and syyskuu → syyskuuta.

Treating “second” as only toinen

• Wrong: Tulin kilpailussa toinen when describing the result “I finished second.”
• Right: Tulin kilpailussa toiseksi.
• Why: Finnish often uses the translative case -ksi for a resulting role or position. The basic form is possible in other sentence structures, such as Olin toinen “I was second.”

Usage Notes

Floors and English-speaking habits

Finnish floor numbering generally labels the entrance-level storey as ensimmäinen kerros, with toinen kerros above it. This usually matches American “first floor” usage but can differ from British “ground floor” usage. In a real building, trust the lift and signs rather than translating a floor label automatically.

Repeated occasions

For “for the first/second/third time,” a very common pattern uses the genitive ordinal plus kerran:

• ensimmäisen kerran — for the first time
• toisen kerran — for the second time
• kolmannen kerran — for the third time

You will also hear compact adverbs such as ensimmäistä kertaa “for the first time.” Treat each expression as a useful chunk; the surrounding verb and sentence structure affect which one is natural.

Ranking and results

The basic form can name someone’s position: Hän on kolmas “He/She is third.” When the sentence focuses on reaching or finishing in that position, Finnish often uses -ksi: Hän tuli kolmanneksi “He/She came third.” This distinction has no visible equivalent in English, but it follows a wider Finnish pattern in which -ksi marks a new state, role, or result.

Beyond the Basics: Declension and Longer Forms

You do not need to master every form at A1, but ordinals can decline in all Finnish cases and can also be plural. The agreement principle remains the same:

• ensimmäisissä kilpailuissa — in the first competitions
• toisilta sivuilta — from the second pages
• kolmansien maiden kansalaiset — citizens of third countries

The form can also stand alone when the missing noun is obvious: Ota toinen can mean “Take the other one” or “Take a second one.” This points to an important feature of toinen: besides the ordinal “second,” it frequently means “other” or “another.” Context decides the reading. toinen päivä may be “the second day” or “another day,” while toisaalta belongs to a related word family and means “on the other hand.”

Compound ordinals become visually long because Finnish writes compounds together. Their case endings affect the compound according to Finnish numeral inflection: kahdeskymmenesensimmäinen “twenty-first,” kahdennenkymmenennenensimmäisen “of the twenty-first.” Such forms are real, but normal writing often uses digits where that improves readability. Recognition is more important than producing every long inflected word early on.

Ordinal words also occur in established names and historical labels. Monarchs and rulers can be identified by an ordinal, and events may be called ensimmäinen maailmansota “the First World War” or toinen maailmansota “the Second World War.” Capitalisation follows the conventions of the whole name, not a special rule that makes every ordinal uppercase.

Finally, not every English sequence label is best translated with a Finnish ordinal. Timetables, route numbers, model numbers, room numbers, and years often use cardinal numbers as labels. Learn the expression used in context rather than assuming that English number three or the third always maps mechanically to kolmas.

Practice Tips

1. Learn a four-form chain. For each of the first ten, say the basic, genitive, partitive, and inessive forms aloud: kolmas – kolmannen – kolmatta – kolmannessa. This exposes the stem changes far better than memorising only a list ending in -s.
2. Describe your own environment. Say which floor you are on, which chapter you are reading, when your next appointment is, and whether it is your first or second visit. Personal facts make the case forms memorable.
3. Read dates both ways. Convert 6.12. into kuudes joulukuuta, then write a spoken date back in digits. Pay special attention to the ordinal dot and to the month’s partitive form.

Related Concepts

• Prerequisite: Numbers and Time — review Finnish cardinal numbers, months, and basic date expressions before building ordinals.