A guide to saying it like a local
How to Say "I don't know" in French
The essential French phrase 'Je ne sais pas' for politely saying you don't know.
Je ne sais pas.
zhuh nuh say PAHneutral
French TTS · 0:01
Use this when asked a question you can't answer, like directions or a specific detail. It's also useful when you're unsure about a plan or a fact during a conversation.
Alternatives
- J'sais pas.More casual, often used with friends or in very relaxed settings.
- Aucune idée.Means 'No idea,' a bit more emphatic and informal.
Ways to get it wrong
Pronouncing 'ne'
The 'e' in 'ne' is often dropped in spoken French, sounding more like 'juh' than 'zhuh-nuh'.
Silent 's' in 'sais'
The 's' at the end of 'sais' is silent; don't pronounce it like 'says'.
A small cultural note
While 'Je ne sais pas' is perfectly polite, sometimes French speakers might offer a guess or a partial answer rather than a flat 'I don't know,' especially if it seems helpful.
The same phrase in other languages
Frequently asked
How to say I don't know in French casually?
You can shorten 'Je ne sais pas' to 'J'sais pas' for a more casual feel. This is common among friends.
What if I want to say I have no clue in French?
Say 'Aucune idée,' which translates to 'No idea.' It's a bit more informal than the standard phrase.
Is 'Je ne sais pas' always polite enough?
Yes, 'Je ne sais pas' is the standard and polite way to express you don't know. It works in almost all situations.
How do French people say "I don't know"?
The most common way to say "I don't know" in French is "Je ne sais pas." This is a standard and widely understood phrase.
How do you say "idk" in French slang?
In informal French slang, you might hear "Ché pas," which is a contraction of "Je ne sais pas." This is very casual and used among friends.
What does "je ne sais quoi" literally mean?
Literally, "je ne sais quoi" translates to "I don't know what." It's often used to describe an indefinable quality.
How do you say "I know" in French?
To say "I know" in French, you would use "Je sais." This is the direct opposite of "Je ne sais pas."
