Assume vs Guess

When to use each in English, with meaning, register, and examples.

 AssumeGuess
MeaningTo take something as true without proof.To try to answer something without being sure.
CEFR levelB2A1
Part of speechverbverb
Usage notesCommonly used in everyday conversation and writing. Avoid using 'assume' in very formal contexts where more precise language is needed.Use 'guess' when you are making a suggestion or estimation without having all the facts. It's appropriate in informal and formal contexts. Avoid using 'guess' in very serious situations where certainty is required.

Frequently asked questions: Assume vs Guess

What's the difference between "Assume" and "Guess"?

"Assume" means: To take something as true without proof. "Guess" means: To try to answer something without being sure.

When should I use "Assume" and "Guess"?

They can all be used in everyday English.

Are "Assume" and "Guess" the same CEFR level?

"Assume" is at B2, "Guess" is at A1 on the CEFR scale.