rough estimation vs roughly estimation

The correct phrase is 'rough estimation.' 'Rough estimation' is a common collocation used to indicate an approximate or imprecise calculation. 'Roughly estimation' is not a standard collocation in English.

Last updated: March 29, 2024 • 2946 views

This phrase is correct and commonly used in English.

"rough estimation"

Use 'rough estimation' when you want to refer to an approximate or imprecise calculation.

Examples:

Can you give me a rough estimation of the cost?
I made a rough estimation of the time it would take to complete the project.
The rough estimation of the population was close to the actual number.
She provided a rough estimation of the number of attendees.
The rough estimation of the distance was surprisingly accurate.

Show examples from the web [+]

A rough estimation of Umean useful for simple cases resulting in an increased additional capacity for future traffic demands.
Where even a rough estimation of the population size cannot be made, enter the population type (e.g. permanent) and enter in the 'data quality' field the value DD (data deficient).
Data quality: G = 'Good' (e.g. based on surveys); M = 'Moderate' (e.g. based on partial data with some extrapolation); P = 'Poor' (e.g. rough estimation).
Can the Commission provide any rough estimation?
Following on from your answer to Mr Rübig's question, do you not also believe that we are yet again seeing how urgently necessary it is that we should have common European standards rather than always arriving at decommissioning dates by a process of rough estimation?

This phrase is not correct in English.

"roughly estimation"

Show examples from the web [+]

Roughly around 10 million, roughly...
This estimation however overlooks the long-term impact of the decision.
Estimation involves judgements based on the latest available reliable information.
Original estimation covering both public and private broadcasters.
In addition a realistic worst-case estimation must be made.
Can the Commission provide any rough estimation?
Today recognize roughly 8,000 species of known reptiles.
Roughly a billion people starve every day.
Practitioners worship orishas, deities that roughly correspond with Catholic saints.
Means TOD was roughly 24 hours ago.
BU Netherlands employed roughly 19000 FTEs.
RA affects roughly three times more women than men.
Roughly six minutes. traffic contingent.
Economic policies come in roughly four variants.
Roughly till you started banging my wife.
Roughly 300 savings and loans involved, roughly 600 senior officials.
Roughly 75% of land in Ireland has been designated as disadvantaged areas, and the current scheme provides aid to roughly 100000 farming families.
The exposure estimation entails three elements: (1) emission estimation; (2) chemical fate and pathways; and (3) estimation of exposure levels.
Wine-colored and roughly the shape of Dorne.
Designs for EC point estimation, for estimation of NOEC, and for conducting a limit test are described.

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rough estimation vs roughly estimation