miscalculated

/M IH0 S K AE1 L K Y AH0 L EY0 T IH0 D/
verb
  1. 1

    To calculate incorrectly.

    โ€œThey miscalculated by assuming the dimensions were in imperial, not metric.โ€

  2. 2

    To make a gross error in judgement.

Source: https://en.wiktionary.org/wiki/miscalculate, https://en.wiktionary.org/wiki/miscalculated