Why does 2nd have two forms in Danish?

The ordinal for second agrees in gender with the noun it modifies. Anden is the common-gender form (den anden bil — the second car) and andet is the neuter form (det andet hus — the second house). The toggle picks the one you need.

Which low ordinals are irregular?

Første (1st), anden/andet (2nd), tredje (3rd), fjerde (4th), femte (5th) and sjette (6th) are irregular. From seventh the pattern becomes regular: syvende, ottende, niende, tiende, and from thirteenth it is the cardinal stem plus -ende (trettende, fjortende …).

How are the vigesimal tens written as ordinals?

They keep their long base-20 forms: 20. tyvende, 50. halvtredsindstyvende, 60. tresindstyvende, 70. halvfjerdsindstyvende, 80. firsindstyvende, 90. halvfemsindstyvende. In compounds the unit comes first, so 53. is treoghalvtredsindstyvende.

Why is there a full stop after Danish ordinals?

In Danish, an ordinal written as a digit is followed by a period: 1. means first, 2. means second. The tool accepts that trailing period in your input and ignores it, returning the spelled-out word.

Is my input sent anywhere?

No. The conversion runs entirely in your browser with the Danish ordinal rules built in. Nothing you type is uploaded to a server.

Danish Ordinal Words

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The Danish Ordinal Words tool turns a position number into its written Danish ordinal — 1. into første, 2. into anden or andet, and so on — including the gender agreement and the vigesimal tens that make Danish ordinals tricky.

How it works

The tool builds the ordinal from three layers.

Irregular low forms. 1. første, 2. anden/andet, 3. tredje, 4. fjerde, 5. femte, 6. sjette. These do not follow a simple suffix rule and are stored explicitly.
Regular forms from 7 up. From seventh the pattern is regular: syvende, ottende, niende, tiende, and from thirteenth it is the cardinal stem plus -ende — trettende, fjortende, femtende.
Tens and compounds. The vigesimal tens keep their long ordinal forms — tyvende (20.), halvtredsindstyvende (50.), firsindstyvende (80.). In a compound the unit comes first, joined by og, with the ordinal marking on the tens: 21. is enogtyvende and 53. is treoghalvtredsindstyvende.

The anden / andet gender choice

Unlike most Danish ordinals, second changes form with gender. Anden is common gender (den anden bil — the second car) and andet is neuter (det andet hus — the second house). Use the toggle to pick the form that matches the noun you are counting.

Example and notes

21. with common gender gives enogtyvende.
Danish writes digit ordinals with a trailing period (3. = third); the tool accepts and ignores that period.
Hundreds and thousands use hundrede and tusinde, joined to the final group by og, so 103. is ethundrede og tredje.