it has been estimated vs it had been estimated

Both phrases are correct, but they are used in different contexts. 'It has been estimated' is used when referring to a recent estimation that still holds true in the present. 'It had been estimated' is used when referring to an estimation that was made in the past but may no longer be valid.

Last updated: March 24, 2024 • 1301 views

it has been estimated

This phrase is correct and commonly used in English.

This phrase is used to indicate that an estimation was made in the past and still holds true in the present.

Show examples from the web [+]
Last updated: November 12, 2024

It has been estimated that 30-40% of all kinds of cancer can be prevented with a healthy lifestyle and dietary measures. A low use of fibres, the intake of red ...
May 2, 2019 ... Is it ok to use " it's estimated that" instead of " it's has been estimated that"? Are they interchangable? C · Chez. Senior Member. London.
Nov 28, 2006 ... It has been estimated that the annual cost to the United States of illiteracy in lost industrial output and tax revenues is at least $20 billion a year.
It has been estimated that roughly two-thirds of those harming a vulnerable adult are family members, most often the victim's adult child or spouse.
Apr 14, 2024 ... It has been estimated that five of the ten highest prices ever paid for a book (adjusted for inflation) were for John James Audubon's The Birds of America.
May 13, 2020 ... It has been estimated that approximately 70% of the Book of Common Prayer comes directly from the Bible, and worshipers in The Episcopal ...
As a consequence; it has been estimated that as many as 25 million agricultural workers worldwide experience unintentional pesticide poisonings each year (4).
It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose you randomly survey 11 California residents.
Mar 25, 2020 ... It has been estimated that only about 26% of residents in Ventura County have adequate earthquake supplies. Suppose you randomly survey 37 residents in the ...
It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose we are interested in the number of California ...

Alternatives:

it is estimated
estimations have been made

it had been estimated

This phrase is correct and commonly used in English.

This phrase is used to indicate that an estimation was made in the past but may no longer be valid or relevant.

Alternatives:

an estimation had been made
it was estimated

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it has been estimated vs it had been estimated