How many plural patterns does German have?

German nouns form their plural in several ways: adding -e, -er, -en, -n or -s, applying an umlaut to the stem vowel, doing both, or leaving the word unchanged. Which class a noun belongs to is largely learned with the word.

How does the umlaut work in plurals?

An umlaut fronts the last stem vowel: a becomes ä, o becomes ö, u becomes ü, and au becomes äu. So Mutter becomes Mütter, Vogel becomes Vögel, and Baum becomes Bäume when its class calls for an umlaut.

When is the -s plural used?

The -s plural is common with loanwords and words ending in a vowel, such as Auto→Autos, Hotel→Hotels and Baby→Babys. It is the default for many foreign borrowings that do not fit the native classes.

Why is the plural article always die?

Regardless of a noun's singular gender, every German plural takes the definite article die in the nominative. So der Mann, die Frau and das Kind all become die Männer, die Frauen and die Kinder in the plural.

Does the tool know each noun's class automatically?

No — German plural class is not fully predictable from spelling, so you select the pattern yourself. The tool then applies that rule correctly, including the umlaut, so you can check or generate the form.

German Plural Helper

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German plurals are notoriously irregular: there is no single rule, and the same ending can attach with or without an umlaut. Nouns instead fall into a handful of plural classes, and learners memorise which class each word belongs to. This helper lets you pick the class and applies it correctly, including the stem-vowel umlaut.

How it works

A German plural is built from two ingredients: an optional umlaut on the stem vowel and an optional suffix. The umlaut fronts the last back vowel — a → ä, o → ö, u → ü, and the diphthong au → äu. The suffix is one of -e, -er, -en, -n, -s, or nothing at all.

Combining these gives the common classes:

-e          Tag    → Tage
umlaut + -e Stadt  → Städte
-er         Kind   → Kinder
umlaut + -er Mann  → Männer
-en         Frau   → Frauen
-n          Blume  → Blumen
-s          Auto   → Autos
zero        Fenster→ Fenster
umlaut only Mutter → Mütter

Whatever the singular gender, the nominative plural article is always die.

Tips

Use the -s class for most loanwords and words ending in a full vowel (Auto, Sofa, Baby). Native masculine and neuter nouns often take -e, sometimes with an umlaut, while many feminine nouns take -en or -n. A small group of masculine and neuter nouns ending in -el, -en or -er take the zero or umlaut-only plural — Fenster stays Fenster, but Mutter becomes Mütter. When you are unsure of a word’s class, check a dictionary entry, then use this tool to apply the umlaut and ending without slipping up.