までもない・
までもない says that there is no need to go so far as to perform an action, often because the answer is already obvious or the action would be excessive. までもなく connects this idea to the statement that follows.
The central idea
The construction does more than state that an action is optional. It suggests that performing the action would be going farther than the situation requires. This makes verbs such as saying, explaining, checking, calculating, and comparing especially natural when the result is already clear.
Completing the sentence
結果は数字を見れば明らかで、改めて計算するまでもない。
The result is clear from the figures, so there is no need to calculate it again.
AnalyzeThe visible figures make recalculation an unnecessary extra step.
Leading into the conclusion
詳しく説明するまでもなく、この制度の問題点は一目で分かる。
Without any need for a detailed explanation, the problems with this system are obvious at a glance.
Analyzeまでもなく leads directly into the statement explaining why a detailed explanation is unnecessary.
Nearby no-need expressions
には及ばない often responds formally to a particular concern, effort, or offer. ことはない is more conversational and commonly reassures someone that an action is unnecessary. By contrast, the present pattern often presents the action as needless because the conclusion is already obvious.
A common fixed member
言うまでもない is the conventional expression “it goes without saying.” It is a particularly common member of this broader pattern, but the construction can be used naturally with many other verbs.
More examples
言うまでもなく、この計画には住民の理解が欠かせない。
It goes without saying that this plan requires the residents' understanding.
Analyze証拠は映像に残っており、事実関係を改めて確認するまでもない。
The evidence is preserved on video, so there is no need to verify the facts again.
Analyze両製品の性能差は仕様表だけで明白で、実際に試すまでもない。
The difference in performance between the two products is clear from the specifications alone, so there is no need to test them in practice.
Analyze彼の満面の笑みを見れば、試験の結果を尋ねるまでもない。
One look at his beaming smile is enough; there is no need to ask how the exam went.
Analyzeこの程度の傷なら、病院へ行くまでもない。
For a wound this minor, there is no need to go to the hospital.
Analyze一目見れば偽物だと分かるので、専門家に鑑定を頼むまでもない。
It is obviously a fake at a glance, so there is no need to ask an expert to appraise it.
Analyze