mis ‧ cal ‧ cu ‧ late /mɪsˈkælkjəleɪt, mɪsˈkælkjʊleɪt/ BrE AmE verb [intransitive and transitive]
1 . to make a mistake when deciding how long something will take to do, how much money you will need etc:
We miscalculated how long it would take to get there.
2 . to make a wrong judgment about a situation:
Tim had miscalculated: Laura would never disobey her father.