How do you say I don’t know in Italian?

How exactly do you say I don’t know in Italian? Is there more than one way to say it?

In this lesson, we will take a look at the different ways you can translate this sentence into Italian. Read on to learn them all!

Let’s get started! Iniziamo!

how do you say i don't know in italian - let's start - iniziamo - athlete woman running

How do you say I don’t know in Italian?

Non (lo) so

Non lo so is the closest translation of I don’t know in Italian and literally means “I don’t know it”.

Non lo so
I don’t know
Literally: I don’t know it

Unlike English, it uses the direct object pronoun “it”. There is also a version without the pronoun, non so, but it’s perceived as a bit informal and uncaring, so it’s not as commonly used.

Non so
I don’t know

unhappy computer that doesn't know things

This common sentence in Italian is made up of three elements.


Direct object pronoun “it”

“I know”

Are you wondering why the direct object pronoun “it” precedes the verb? Learn how the Italian direct object pronouns work here.

So is the first-person singular conjugation of sapere, to know, in the present tense. Sapere is one of the four Italian modal verbs and it’s also an irregular verb.

Present tense conjugation for sapere

lui, leisa

Title: Italian All-in-One For Dummies
Language: English / Italian
Publisher: For Dummies
Pages: 672

Learn to speak Italian like a native? Easy.
Italian All-in-One For Dummies appeals to those readers looking for a comprehensive, all-encompassing guide to mastering the Italian language. It contains content from all For Dummies Italian language instruction titles, including Italian For Dummies, Intermediate Italian For Dummies, Italian Verbs For Dummies, Italian Phrases For Dummies, Italian Grammar For Dummies, and Italian For Dummies Audio Set.

For example, you could say…

So cucinare, ma non so cantare.
I can cook, but I can’t sing.

Sai leggere l’alfabeto cirillico?
Can you read the Cyrillic alphabet?

Sapete suonare il pianoforte?
Can you play the piano?

cat playing a piano - italian modal verb sapere

Non ne ho idea

This is another common translation for I don’t know in Italian, and it’s used when you want to emphasize that you don’t know something. It literally translates to “I don’t have any idea about it”.

Non ne ho idea!
I don’t know!
Literally: I don’t have any idea about it.

Non ne ho la più pallida idea

If you want to emphasize even further that you don’t know something in Italian, you can use non ne ho la più pallida idea, which translates to I don’t have the slightest idea.

Non ne ho la più pallida idea!
I don’t have the slightest idea!
Literally: I don’t have the palest idea about it!

Pallida means pale, while the particle ne once again means about it.

sweating woman who doesn't have the slightest idea about something


Don’t use boh in formal situations, because it’s a very informal (and very popular) way of saying I don’t know in Italian! It’s an exclamation and it has no literal translation into English.

I don’t know!

It’s usually accompanied by a hand movement: palms up, as in the following picture!

man with palms up saying "boh!" in italian

Che ne so!

Che ne so is another colloquial way of saying I don’t know in Italian. Again, don’t use it in formal settings. It can be perceived as rude even among friends because it conveys impatience.

Che ne so!
I don’t know!

In its variant che cavolo ne so!, it can be translated very closely to the English expression the hell if I know!.

Che cavolo ne so!
The hell if I know!

angry man writing on a piece of paper

A saperlo! / Magari lo sapessi!

A saperlo and magari lo sapessi are two less common ways of saying I don’t know in Italian, but they are different from the expressions we’ve seen so far. They convey a need to know what you don’t know, similar to I wish I knew.

A saperlo!
I wish I knew!
Literally: To know it!

Magari lo sapessi!
I wish I knew!
Literally: If only I knew!

And that’s the end of our lesson on how to say I don’t know in Italian in all its forms!

What next?

➡️ Learn other common Italian questions!

Now that you’ve seen how to say I don’t know in Italian, you might want to keep learning Italian online with these free Italian resources:

Aiuta Lingookies con un 👍!

❤️ If you liked this lesson on how to say I don’t know in Italian, consider sharing it with your social media friends who are also studying Italian.