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

Examples
Esta cifra es solo una aproximación; no tenemos el total final.
This figure is just an approximation; we don't have the final total.
Vimos la aproximación del avión desde la terraza.
We saw the airplane's approach from the terrace.
Necesitamos una nueva aproximación para resolver este conflicto.
We need a new approach to resolve this conflict.
Always a 'La' word
Most Spanish words ending in '-ción' are feminine, so you should always use 'la' or 'una' with aproximación.
Using 'a' to show direction
When talking about moving toward something, use the word 'a' (to/towards) right after: 'La aproximación a la ciudad' (The approach to the city).
Don't confuse the noun and verb
Mistake: “Yo aproximación al perro.”
Correction: Yo me aproximo al perro (or) Mi aproximación al perro fue lenta. 'Aproximación' is the thing/event, not the action you do.
Related Translations
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