miscalculate

verb

1. (intransitive, transitive)To calculate incorrectly.

   “They miscalculated by assuming the dimensions were in imperial, not metric.”

2. (intransitive, transitive)To make a gross error in judgment.

   “Hitler and the Japanese generals miscalculated badly, 10 years ago, when they thought we would not be able to use our economic power effectively for the defeat of aggression. Let would-be aggressors make no such mistake today.”

   “In the end, one could say with minimal originality, but considerable accuracy, that Bill Simmons simply flew too close to the sun. He miscalculated how much value ESPN put on him and on his unique abilities and talents.”

   “Obsessed only with cost, 'Sir Humphrey' saw that Transport for London 'got away' with ticket office closures on the Tube with only minor public pushback and miscalculated that it could do the same on the national network. This assumption backfired spectacularly.”