expression
Used to indicate an upper limit or the most optimistic estimate. Often paired with 少なくとも (at least) for contrast.
See also: 少なくとも
この仕事は多くとも三日で終わるでしょう。
This work will be finished in three days at most.
多くとも百人くらいしか入れない小さな会場だ。
It's a small venue that can hold at most about a hundred people.