a calculation that has not been done correctly, or the act of calculating something wrongly

The project went over budget because of a miscalculation at the planning stage. 由于计划阶段的误算，该项目超出了预算。

They are calling for a recount because of errors and miscalculations in the compilation of the poll result. 由于民意调查结果编制中的错误和误算，他们要求重新计票。

a wrong judgment about a situation

The conspirators' plot failed because they made two fatal miscalculations. 阴谋者的诡计失败了，因为他们做出了两个致命的误算。

I think they were trying to cover up for their grossly negligent political miscalculation. 我认为他们是在试图掩盖他们严重疏忽的政治误判。