How to Say "conversion" in Spanish
The Spanish word for “conversion” is “conversión” — B1 level. This is a very common word in everyday Spanish.

Examples
La conversión de dólares a euros es muy sencilla hoy.
The conversion from dollars to euros is very simple today.
Necesito un programa para la conversión de archivos de audio.
I need a program for the conversion of audio files.
La conversión de este antiguo edificio en hotel fue un éxito.
The conversion of this old building into a hotel was a success.
The '-ción' Rule
Almost all Spanish words ending in '-ción' are feminine. This means you should always use 'la' or 'una' with this word.
Using 'de' and 'a'
To describe a change, we usually say 'conversión DE (the original) A (the result)', just like saying 'from' and 'to' in English.
Using the wrong gender
Mistake: “El conversión de archivos.”
Correction: La conversión de archivos. Because words ending in -ción are feminine.
Other Meanings of “conversión”
“conversión” can also mean:
- a change in religious or political beliefs(B2)
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