(|)mis+ verb
Etymology: mis- (I) + calculate
transitive verb
: to calculate wrongly
miscalculated his dive into the canal … and scored his chest into one mass of wounds — D.H.Lawrence
miscalculated the state of the tide — W.F.Hambly
intransitive verb
: to make a mistake in calculation
either elation or depression tends to make you miscalculate when you're driving a car — Better Homes & Gardens