to roughly calculate or guess (based on incomplete information) a value, quantity, or extent of something
Their value to Bathsheba, and indeed to anybody, Oak mentally estimated by the following simple calculation:— 5 x 30 = 150 quarters = 500 L. 3 x 40 = 120 quarters = 250 L. —— Total … 750 L. Seven hundred and fifty pounds in the divinest form that money can wear—that of necessary food for man and beast: should the risk be run of deteriorating this bulk of corn to less than half its value, because of the instability of a woman?
There are no more uses of "estimate" identified with this meaning, but check unspecified meaning below.
Had Gabriel been able from the first to get a distinct view of her countenance, his estimate of it as very handsome or slightly so would have been as his soul required a divinity at the moment or was ready supplied with one.
The scheme seemed at first impossible: the journey was a fearfully heavy one, even for a strong horse, at her own estimate; and she much underrated the distance.
…it firmly, allowing herself, nevertheless, as girls will, to dwell upon the happy life she would have enjoyed had Troy been Boldwood, and the path of love the path of duty—inflicting upon herself gratuitous tortures by imagining him the lover of another woman after forgetting her; for she had penetrated Troy's nature so far as to estimate his tendencies pretty accurately, but unfortunately loved him no less in thinking that he might soon cease to love her—indeed, considerably more.