Class 3 — the -er plural — is the trickiest of the five Swedish declensions, because it gathers three rather different kinds of noun under one ending: many ordinary one-syllable words (sak → saker), the great mass of stress-final loanwords (station → stationer), and a small, famous set of umlaut nouns whose stem vowel changes in the plural (hand → händer, bok → böcker). The first two are straightforward once you know the ending; the third is the one learners fear. This page's main job is to defuse that fear: the umlaut plurals are not a productive rule you have to apply on the fly — they are a short, closed list of high-frequency words you simply memorise. Learn the handful and the rest of class 3 is easy.
The basic rule: add -er
For the regular members of class 3 you take the noun and add -er. These are mostly one-syllable en-words (and a few ett-words), typically ending in a consonant:
en sak → saker · en färg → färger · en park → parker · en fest → fester
There is no vowel to drop and no stem change — just the ending. The challenge with these is not the mechanics but knowing that they take -er rather than the competing -ar of class 2: both classes contain one-syllable en-words, and there is no fully reliable rule that sorts them. You learn sak → saker but dag → dagar as individual facts. (A weak tendency: words felt as more "abstract" or borrowed lean toward -er.)
Vi måste fixa tusen saker innan gästerna kommer.
We have to sort out a thousand things before the guests arrive. sak → saker; gäst → gäster.
Höstens färger är otroliga i år.
The autumn colours are incredible this year. färg → färger — a one-syllable en-word in class 3.
Det var en av de bästa festerna i somras.
It was one of the best parties this summer. fest → fester.
Stress-final loanwords take -er
This is the most predictable part of class 3 and the most useful. The huge family of loanwords stressed on the final syllable lands here almost without exception. If a borrowed noun ends in a stressed syllable — words like station, telefon, maskin, restaurang, partí — it takes -er:
en station → stationer · en maskin → maskiner · en telefon → telefoner · ett parti → partier
Note that this is one of the few corners of class 3 where ett-words appear in numbers: ett parti → partier ("party / batch / portion"), ett konditori → konditorier ("café / patisserie"). Stress, not gender, is the trigger here.
Det finns flera stationer mellan Stockholm och Uppsala.
There are several stations between Stockholm and Uppsala. station → stationer — a stress-final loanword.
De stora partierna förlorade röster i valet.
The big parties lost votes in the election. ett parti → partier — a stress-final ett-word in class 3.
Fabriken har bytt ut sina gamla maskiner.
The factory has replaced its old machines. maskin → maskiner.
The umlaut subgroup: a closed list, not a rule
Now the famous part. A small set of very old, very common nouns forms its plural by changing the stem vowel (an umlaut, Swedish omljud) and adding -er. The vowel shifts are regular in shape — a → ä and o → ö — but you cannot predict which words undergo them. Hand becomes händer and land ("country") becomes länder, yet the look-alike dag ("day") stays dagar and vägg ("wall") stays väggar — no umlaut at all. So treat this as a memorised list, not a productive process you run on new words.
Here is the core set, all four forms. These are worth learning as a block:
| Indef. sing. | Def. sing. | Indef. plural | Def. plural | Vowel shift | Meaning |
|---|---|---|---|---|---|
| en hand | handen | händer | händerna | a → ä | hand |
| en stad | staden | städer | städerna | a → ä | town / city |
| en natt | natten | nätter | nätterna | a → ä | night |
| en bok | boken | böcker | böckerna | o → ö (+ k→ck) | book |
| en fot | foten | fötter | fötterna | o → ö | foot |
| en rot | roten | rötter | rötterna | o → ö | root |
| en son | sonen | söner | sönerna | o → ö | son |
| en bonde | bonden | bönder | bönderna | o → ö (drop -e) | farmer |
Read down the "vowel shift" column and the pattern is clean: every a becomes ä, every o becomes ö. The shift is in both spelling and sound — händer is pronounced with the ä vowel, not the a of hand. Two members deserve a note: bok → böcker also doubles its consonant (the k becomes ck), and bonde → bönder drops its final -e before the -er.
Tvätta händerna innan du lagar mat.
Wash your hands before you cook. hand → händer → definite händerna.
Hon har bott i tre olika städer det här året.
She has lived in three different towns this year. stad → städer — a → ä.
Jag har redan läst alla böckerna i serien.
I've already read all the books in the series. bok → böcker → böckerna; note the k → ck.
Mina fötter är iskalla efter promenaden.
My feet are freezing after the walk. fot → fötter — o → ö.
The full paradigm: definite plural -erna
A class 3 noun runs through the four forms with the indefinite plural in -er and the definite plural adding -na to give -erna. For the umlaut nouns the changed vowel simply carries through every plural form:
| Indef. sing. | Def. sing. | Indef. plural | Def. plural | Meaning |
|---|---|---|---|---|
| en sak | saken | saker | sakerna | thing |
| en station | stationen | stationer | stationerna | station |
| ett parti | partiet | partier | partierna | party |
| en hand | handen | händer | händerna | hand |
Stationerna längs kusten är vackra gamla byggnader.
The stations along the coast are beautiful old buildings. Definite plural: station → stationer → stationerna.
Sakerna i lådan måste sorteras före flytten.
The things in the box have to be sorted before the move. sak → saker → sakerna.
Why the umlaut exists: an Old Norse fossil
The vowel change is not arbitrary, even if it now looks random. In Old Norse the plural ending contained an -i- whose front vowel pulled the stem vowel forward — a toward ä, o toward ö. The ending later eroded to -er, but the vowel it bent stayed bent. So händer, böcker, fötter are fossils of a sound change that finished a thousand years ago. You will recognise the same pattern in English, which inherited it from the same Germanic source: foot → feet, tooth → teeth, man → men, mouse → mice. Swedish fot → fötter and English foot → feet are literally the same ancient process. Seeing that the umlaut plural is the cousin of English feet and mice makes the small Swedish list feel familiar rather than alien — and reminds you that, like in English, it is a closed set: no new word joins it.
Common Mistakes
❌ en bok → boker
Incorrect — failing to apply the umlaut. This noun changes its vowel: bok → böcker.
✅ en bok → böcker
a book → books — o → ö, and k → ck.
❌ en hand → handar (treating it as class 2)
Incorrect — 'hand' is an umlaut noun in class 3, not a regular -ar word.
✅ en hand → händer
a hand → hands — a → ä, plus -er.
❌ två stationer → 'two stations' written as 'two stations / stations'
Incorrect — loanwords take Swedish -er, never the English -s.
✅ två stationer
two stations — stress-final loanword → -er.
❌ böcker for 'the books'
Incorrect — that's the indefinite plural; the definite plural adds -na: böckerna.
✅ böckerna
the books — umlaut plural + -na.
❌ Applying umlaut to a word that doesn't take it, e.g. 'dag → däger'
Incorrect — umlaut is a closed list. 'dag' is class 2: dag → dagar.
✅ en dag → dagar
a day → days — no umlaut; only the listed words change their vowel.
Key Takeaways
- Class 3 is the -er plural, with definite plural -erna (saker → sakerna).
- It covers many one-syllable en-words (sak → saker, fest → fester) and, most reliably, stress-final loanwords (station → stationer, parti → partier) — including some ett-words.
- The umlaut subgroup changes its stem vowel (a → ä, o → ö) plus -er: hand → händer, stad → städer, bok → böcker, fot → fötter, son → söner.
- The umlaut is a closed, memorisable list, not a productive rule — the same Germanic fossil that gives English foot → feet and mouse → mice.
- Never use an English -s, and never file an umlaut noun under class 2 (handar, boker are wrong).
Now practice Swedish
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Start learning Swedish→Related Topics
- The Five Plural DeclensionsA2 — Swedish builds plurals through five declension classes — -or, -ar, -er, -n, and a zero ending — not the English -s. This overview names all five, gives a model noun for each, and lays out the prediction rules competitors omit: gender plus the word's final sound forecasts the class about 80% of the time, so the system is far less random than it first looks.
- Irregular and Foreign PluralsB1 — The plurals that escape the five regular declensions: suppletive natives (en man → män, en mus → möss, en gås → gäss, en ko → kor), the Old Norse -on body-part plurals (ett öga → ögon, ett öra → öron), and Latin/Greek loan plurals (ett museum → museer, ett centrum → centra/centrum, en examen → examina). Small closed lists to memorise — not rules to apply — plus the honest note that some Latin plurals are optional.
- The Definite PluralA2 — How Swedish says 'the cars / the girls / the houses': you take the indefinite plural and add a second definite suffix — -orna (flickorna), -arna (bilarna), -erna (sakerna), -na (äpplena), and -en for the zero-plural ett-words (husen). The rule of thumb: add -na to vowel-ending plurals, -en to consonant-ending zero plurals. Plus the dangerous look-alike: husen ('the houses') vs the -en that elsewhere marks the definite SINGULAR.
- Loanwords and Their AdaptationB2 — What Swedish does to a borrowed word. Spelling is sometimes Swedified (mejl, dejt, tejp) and sometimes left foreign (mail, date, server); gender defaults to en (tech/abstract loans often ett); plurals get Swedish endings (en blogg → bloggar), not English -s. The one rule with no exceptions: a borrowed VERB always joins conjugation Group 1 and takes full Swedish endings — googla → googlade → googlat — so an English verb becomes perfectly regular the moment it enters Swedish.