Det er en aftale.

Det means it in this sentence. Danish often uses det er for very common statements like:

• Det er godt = it is good
• Det er rigtigt = that is correct / it is true
• Det er en aftale = it’s a deal / agreed

So det here is the normal subject pronoun for this kind of statement.

Er is the present tense of at være, which means to be.

So:

• jeg er = I am
• du er = you are
• det er = it is

In Det er en aftale, er simply means is.

In Danish, nouns have grammatical gender, and each singular common noun takes either en or et.

Aftale is an en-word, so you say:

• en aftale = an agreement / a deal

You cannot say et aftale.

A useful thing to memorize is the noun together with its article:

• en aftale

Aftale usually means agreement, deal, or arrangement, depending on context.

Examples:

• Vi har en aftale = We have an agreement / arrangement
• Det er en aftale = It’s a deal / Agreed
• Jeg har en aftale med lægen = I have an appointment with the doctor

So the word can be used both for a general agreement and for a scheduled arrangement.

Yes. It is a very natural everyday phrase.

It is commonly used when two people agree on something, especially after deciding a plan:

• Vi ses klokken otte.
• Det er en aftale.

It can sound like:

• It’s a deal
• Agreed
• Sounds good

The exact English equivalent depends on context, but in Danish it is a standard, natural phrase.

In careful pronunciation, it is roughly:

deh ehr en af-tay-leh

But in natural spoken Danish, sounds often get reduced. A more realistic everyday rhythm is closer to:

de e en af-tæ-le

A few pronunciation notes:

• det often sounds more like de in fast speech
• er is often very weak in everyday speech
• aftale has the stress on the second syllable area: af-TA-le

If you are learning, it is fine to start with a clearer pronunciation and then notice how natives reduce it in conversation.

Because in Danish, a singular countable noun normally needs an article if it is indefinite.

So you say:

• Det er en aftale

just as you would say:

• Det er en bil = It is a car
• Det er en idé = It is an idea

Without en, aftale would sound incomplete in normal Danish.

Yes, but it means something slightly different in use.

By itself, Aftale can work like Deal, Okay, or Agreed in casual conversation. It is short and informal.

For example:

• Vi mødes i morgen klokken ni.
• Aftale.

That is very common in speech and texting.

So:

• Det er en aftale = full sentence, a bit more complete
• Aftale = short, casual response

The definite singular is:

• aftalen = the agreement / the deal / the arrangement

Danish usually adds the definite ending to the noun itself.

So:

• en aftale = an agreement
• aftalen = the agreement

Examples:

• Det er en aftale = It’s a deal
• Aftalen er god = The agreement is good

You usually add ikke after the verb:

• Det er ikke en aftale = It is not a deal / That’s not an agreement

This is the normal position for negation in a simple main clause:

• subject + verb + ikke

So:

• Det = subject
• er = verb
• ikke = not
• en aftale = noun phrase

Yes, but the basic form Det er en aftale is the normal neutral order.

In Danish main clauses, the finite verb is usually in second position. That means you can move another element to the front, but then the verb still stays second.

For example:

• Nu er det en aftale = Now it’s a deal
• Så er det en aftale = Then it’s a deal / Okay, then it’s settled

Notice that when nu or så comes first, er still stays in second position.

It is neutral and works in both everyday and moderately formal situations.

You can use it with friends, coworkers, or in practical discussion. It is not slang, but it is also not overly formal.

In very casual speech, people may shorten it to just:

• Aftale

In more formal written contexts, people might choose wording that is more specific, depending on the type of agreement. But Det er en aftale itself is perfectly standard and natural.

Yes, a few useful ones are:

• Okay = okay
• Fint = fine
• Godt = good
• Det er i orden = that is fine / okay
• Så er vi enige = then we agree
• Aftale = deal / agreed

These are not always exact synonyms, but they often appear in similar situations when people confirm agreement or accept a plan.