es‧ti‧mate1 S3 W2 [countable]
a calculation of the value, size, amount etc of something:
a rough estimate (=not an exact calculation) of how much time we'll need
A conservative estimate (=a deliberately low estimate) puts annual sales at around $100 million.
The figure will only be about two million, less than half the original estimate.
Some estimates put the number of deaths at several hundred.
a statement of how much it will probably cost to build or repair something
The garage said they'd send me an estimate for the work.