How to Say "let's assume" in Spanish
The Spanish word for “let's assume” is “supongamos” — B1 level. This is a very common word in everyday Spanish.

Examples
Supongamos que mañana no hay clases.
Let's suppose there are no classes tomorrow.
Supongamos por un momento que él tiene razón.
Let's assume for a moment that he is right.
Supongamos que el plan falla, ¿qué haremos?
Let's say the plan fails, what will we do?
The 'Let's' Command
Even though this is a verb form, when we say 'supongamos,' we are usually making a suggestion to a group, like saying 'let's' in English.
Connecting the Idea
In Spanish, you almost always need the word 'que' (meaning 'that') immediately after 'supongamos' to start your hypothetical sentence.
Missing the 'Que'
Mistake: “Supongamos tú tienes razón.”
Correction: Supongamos QUE tú tienes razón.
Related Translations
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