どうせだから

expression

might as well; since it's come to this; why not

Used when a situation has already led to a certain point, and the speaker decides to take advantage of it or go along with it. Often carries a casual, resigned, or opportunistic tone.

• どうせだから、ついでに買かい物ものも済すませよう。

  Since we're here anyway, let's get the shopping done too.

• どうせだから、最さい後ごまでやってみようよ。

  Might as well give it a try until the end.