at a guess

at a guess

As an estimate or speculation. At a guess, I think we're going to need about 10 more chairs.
See also: guess
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

at a ˈguess

as a rough estimate: At a guess, I would say there were about thirty people in the room.
See also: guess
Farlex Partner Idioms Dictionary © Farlex 2017
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