Formation
Meaning
Indicates that there is no need to go as far as doing something because it is obvious, or that the result is already clear without doing it.
Note
A formal expression used to say that a certain action is unnecessary because the situation is already perfectly clear. It often carries the nuance of 'it's so obvious that describing it is a waste of time'. It is frequently used in the fixed phrase '言うまでもない' (needless to say / it goes without saying). When used with '〜までもなく', it functions as a conjunction meaning 'without even needing to...'.
Examples
この問題は説明するまでもなく、誰でも分かる。
This problem is obvious without explanation; anyone can understand it.
彼の実力は言うまでもない。
His ability goes without saying.
相手の気持ちを考えることは、言うまでもなく大切だ。
It goes without saying that considering the other person's feelings is important.
結果を見るまでもなく、失敗だとわかった。
Without even looking at the results, I knew it was a failure.
わざわざ調べるまでもない簡単な話だ。
It's a simple matter that doesn't need to be investigated.
そんなことは説明するまでもありません。
There's no need to explain such things.