Datamængden er stor.

It is a compound noun:

• data = data
• mængde = amount, quantity
• -n / -en = the definite ending

So datamængden means the amount of data or the data volume.

Danish very often joins nouns into one word, where English would use several words.

Because Danish commonly forms compound nouns by writing them as a single word.

So:

• data
  • mængde → datamængde = amount of data
• datamængde
  • definite ending -n / -en → datamængden = the amount of data

This is very normal in Danish. English often keeps these ideas separate, but Danish usually combines them.

The ending -en marks the noun as definite: the.

Compare:

• en datamængde = an amount of data
• datamængden = the amount of data

In Danish, the definite article is often attached to the end of the noun instead of standing in front of it.

In Danish, the definite article is usually a suffix, not a separate word.

So instead of saying something like the datamængde, Danish says:

• datamængden

This is one of the big differences from English.

Er means is / are / am in the present tense of the verb at være (to be).

So:

• Datamængden er stor = The amount of data is large

It links the subject (datamængden) with the description (stor).

The form of the adjective depends on the noun it describes.

Here, datamængden is based on en mængde, which is a common gender noun (en-word), singular, and definite. In this kind of predicate sentence after er, the adjective is typically:

• stor for common gender singular

Compare:

• En mængde er stor = An amount is large
• Et problem er stort = A problem is large
• Mængderne er store = The amounts are large

So stor matches the singular common-gender noun.

Because stor is a predicative adjective, not an adjective placed directly before the noun.

In this sentence:

• Datamængden er stor

the adjective comes after er, so it describes the subject through the verb. In that position, Danish does not use the same definite adjective form you would use before a noun.

Compare:

• Datamængden er stor = The amount of data is large
• Den store datamængde = The large amount of data

Before the noun, you get store. After er, you get stor.

In modern Danish, data is usually treated as a mass noun, much like in everyday English.

So in datamængde, data works like material or content: amount of data.

Learners sometimes wonder whether it should behave like a plural, but in this kind of compound noun, that is not an issue. Datamængde is a singular noun meaning data amount / quantity of data.

The sentence follows normal Danish main-clause word order:

• Datamængden = subject
• er = verb
• stor = complement/adjective

So it is:

Subject + verb + description

This is very similar to English:

The amount of data + is + large

Yes. You can expand the adjective naturally.

For example:

• Datamængden er meget stor. = The amount of data is very large.
• Datamængden er stor nok. = The amount of data is large enough.
• Datamængden er alt for stor. = The amount of data is far too large.

The core structure stays the same.

The letter æ is a very common Danish vowel. It does not sound exactly like any single English vowel, but it is often somewhat like the vowel in cat or air, depending on accent and context.

Mængde is roughly pronounced something like:

• MENG-duh or MENG-thuh as a very rough guide

But Danish pronunciation is softer and less exact than English spelling-based guesses suggest.

A few helpful points:

• æ is a front vowel
• g in Danish can be softened or weakened in some positions
• the final -e is often a reduced vowel, like a weak uh

If you are learning pronunciation, it is best to listen to native audio, because Danish spelling often does not map neatly to English-style pronunciation expectations.

Yes. Datamængden er stor. is a perfectly natural short sentence, especially in technical, academic, or business contexts.

It might be used when talking about:

• storage
• databases
• file sizes
• research material
• network traffic

In everyday English, you might sometimes translate it more idiomatically as:

• There is a lot of data
• The data volume is large
• The amount of data is large

The best English translation depends on context, but the Danish sentence itself is straightforward and natural.