estimation
n. C / Un. a guess or calculation of the value, size, or cost of something. You use this when you do not have the exact numbers but want to be close.
n. a judgment or calculation regarding the approximate value, amount, or nature of something. Often involves the use of statistical or mathematical models to reach a conclusion.
The builder gave us an estimation of the total cost.
According to the latest estimation by the finance department, the project will take six months to complete.
While the initial estimation of the crowd size was modest, subsequent aerial photography suggested that the actual attendance was nearly double the original figure.
From Middle English estimacioun, estimacion, from Old French estimacion, from Latin aestimatio. Morphologically estimate + -ion.
Countable when referring to a specific calculation or quote; uncountable when referring to the general process of judging something.
In my estimation about the situationIn my estimation of the situationWhen expressing an opinion or judgment, the noun is typically followed by the preposition 'of' rather than 'about'.