What is the difference between supongo and adivino?

Supongo means I assume or I suppose—it expresses uncertainty about something. Adivino means I guess in the game sense, like guessing a number, solving a riddle, or predicting the future (adivinar also means to divine or foretell).

Is supongo formal or informal?

Supongo works in both formal and informal contexts. For casual speech, you might also hear a lo mejor (maybe) or quizás (perhaps) to express similar uncertainty with a different flavor.

How do I say I guess not in Spanish?

You can say supongo que no (I guess not), creo que no (I don't think so), or me imagino que no (I imagine not). Each carries the same tone of uncertain disagreement.

Spanish vocabulary · Beginner

I GUESS in Spanish: SUPONGO

Written by Sofia Ramirez, Lead Spanish Curriculum Editor · Reviewed May 2026

Supongo · phrase · soo-POHN-goh

Supongo (from the verb suponer) is the most direct Spanish equivalent of I guess, conveying uncertainty, reluctant agreement, or assumption. Spanish offers several alternatives with slightly different tones—creo que sí sounds more optimistic, while me imagino carries a more reflective nuance—allowing speakers to fine-tune exactly how uncertain they want to sound.

soo-POHN-goh

Supongo que tienes razón.

I guess you're right.

i guess in Spanish: Quick Reference

Below are the most common Spanish words for i guess, with pronunciation and regional usage notes.

Spanish	English	Pronunciation	Region / Register
supongo	i guess	soo-POHN-goh	Default, widely understood
creo que sí	i guess		I think so / I guess so
me imagino	i guess		I imagine / I suppose

How Native Speakers Use Supongo

Real example sentences across three contexts you'll actually run into.

Reluctant Agreement

—¿Vamos al cine? —Supongo que sí.

—Shall we go to the movies? —I guess so.

Expressing lukewarm agreement without enthusiasm.

Making an Assumption

Me imagino que ya habrán llegado.

I guess they must have arrived by now.

Using me imagino to express a logical assumption.

Uncertain Response

Creo que sí, pero no estoy seguro.

I guess so, but I'm not sure.

A hedged response showing partial confidence.

Avoid These Mistakes When Using Supongo

Using Adivinar

Incorrect: Yo adivino que ella vendrá.

Correct: Supongo que ella vendrá.

Adivinar means to guess in the sense of guessing a riddle or number. For expressing assumption or uncertainty, suponer is correct.

Wrong Conjugation

Incorrect: Yo supone que sí.

Correct: Yo supongo que sí.

Suponer has an irregular first-person form: supongo, not supone (which is third person).

Lock in i guess Vocabulary with the Parrot Method

Why word lists alone don't stick

Memorizing a translation feels productive, but most learners forget 70% of what they studied within 48 hours. Vocabulary needs spaced repetition AND real-world exposure to transfer to long-term memory.

See Supongo used by native speakers

Parrot's short-form videos feature native speakers using supongo in real situations. Context-based exposure beats flashcards, you hear Supongo que tienes razón. while watching someone live the moment, connecting meaning, sound, and rhythm at once.

Save, review, repeat, stay consistent

Tap any word to save it. Parrot's spaced-repetition system surfaces it right before you'd forget, no manual flashcard creation. The watch, parrot back, save, review cycle turns recognition into fluency at 2.7x the speed of traditional study.

Common Questions About i guess in Spanish

What is the difference between supongo and adivino?: Supongo means I assume or I suppose—it expresses uncertainty about something. Adivino means I guess in the game sense, like guessing a number, solving a riddle, or predicting the future (adivinar also means to divine or foretell).
Is supongo formal or informal?: Supongo works in both formal and informal contexts. For casual speech, you might also hear a lo mejor (maybe) or quizás (perhaps) to express similar uncertainty with a different flavor.
How do I say I guess not in Spanish?: You can say supongo que no (I guess not), creo que no (I don't think so), or me imagino que no (I imagine not). Each carries the same tone of uncertain disagreement.