1.
to miscalculate; for one's calculations or expectations to go wrong
Describes a situation where planned numbers, budgets, or expectations turn out to be wrong due to unforeseen circumstances, throwing off one's plans or financial estimates.
An idiomatic expression where 勘定 refers to calculations or expectations (not just a restaurant bill), and 狂う means to go off course or go wrong. Used when planned numbers, budgets, or expectations fail to match reality.
Usage
The subject is 勘定, and the verb 狂う is intransitive. The expression describes the situation rather than blaming a person — it is the calculations themselves that go awry.
Common collocations
- 予算の勘定が狂う: budget calculations go wrong
- 見積もりの勘定が狂う: estimates go off
- すっかり勘定が狂う: for calculations to go completely off