Weten vs Kennen: Two Ways to Know

English uses a single verb, to know, for two quite different mental relationships: knowing a fact ("I know that it's raining") and knowing a person or thing ("I know your sister"). Dutch keeps these apart with two separate verbs — weten and kennen — and you have to pick the right one every time. The good news is that the split is sharp and rule-governed, not a matter of feel: once you know which side of the line a sentence falls on, the choice is automatic. German speakers will recognise this exactly (wissen vs kennen), as will anyone who has studied French (savoir vs connaître) or Spanish (saber vs conocer).

The one rule that decides it

Everything on this page reduces to a single test based on what comes after the verb:

• weten takes a clause or a fact — a dat-clause, a wh-question word, or the pronoun het. You weet things that can be true or false: information, answers, the time, whether something is the case.
• kennen takes a noun phrase — a person, a place, a thing, a name, a song. You kent what you are acquainted with: someone you've met, a city you've been to, a book you've read.

Weten: facts, clauses, and information

Use weten when the object of "know" is a piece of information — something you could write down as a statement of fact. In practice weten is followed by one of three things: a dat-clause, an indirect question (hoe, waar, wanneer, of…), or the stand-in pronoun het.

Note that last one: the bare Dutch answer to "do you know?" is Ik weet het niet — with het. English drops the object ("I don't know"), but Dutch keeps the pronoun, because weten wants its fact spelled out, even as a placeholder. Leaving it off (Ik weet niet) sounds unfinished to a native ear.

Weten is a slightly irregular verb. Its key forms: present ik weet, jij weet, hij weet, wij weten; the past is wist / wisten; the past participle is geweten (with hebben: ik heb het altijd geweten — "I always knew it").

Kennen: people, places, and things

Use kennen when the object is a noun you are acquainted with. The classic objects are people, but it extends to places, songs, words, books, brands — anything you can be familiar with through experience rather than through a fact.

That second example is the perfect minimal pair: in one sentence you ken the song (you recognise it, you're familiar with it) but you don't weet its title (a missing fact). Hold on to it — it shows both verbs doing their proper jobs side by side.

Kennen is a regular weak verb: present ik ken, jij kent, hij kent, wij kennen; past kende / kenden; participle gekend.

The two side by side

This table is the whole page in miniature. The English column is identical ("know"); the Dutch column is not.

A useful borderline case: het antwoord weten ("to know the answer"). It looks like a noun object, which might tempt you toward kennen — but an answer is a fact (it could be right or wrong), so Dutch says Ik weet het antwoord. The deeper logic wins over the surface grammar: it's the kind of thing you know (information vs. acquaintance), not merely the part of speech, that decides the verb. Likewise de weg weten ("to know the way") — the route is information you can recite — uses weten, while de weg kennen is also possible when you mean you're familiar with the area. That subtle pair is worth re-reading.

A note on near-synonyms and 'leren kennen'

Two everyday phrases lock the verbs in place. To meet someone for the first time is iemand leren kennen — literally "to learn to know someone," which is pure kennen logic (you become acquainted). And the set phrase voor zover ik weet ("as far as I know") is weten, because it's hedging a fact.

Common Mistakes

These are the exact slips English speakers make, because English collapses both verbs into one word.

Key Takeaways

• weten + a clause or fact (dat…, hoe…, of…, het); kennen + a noun (person, place, thing).
• The English "know that / know how / know whether" always maps to weten; "be acquainted/familiar with" maps to kennen.
• It's the kind of knowledge (information vs. acquaintance) that decides — so het antwoord weten and de weg weten use weten even though the object looks like a plain noun.
• Keep the placeholder in Ik weet het niet — dropping het sounds incomplete.
• leren kennen = to meet / get to know someone; pure kennen.