Etymology
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miscalculate (v.)

"make a wrong estimate of," 1705; from mis- (1) "badly, wrongly" + calculate. Related: Miscalculated; miscalculating.

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miscount (v.)

late 14c., "to count erroneously," also "to misjudge, deceive oneself," from Old French mesconter "give a false statement; miscalculate, be wrong in reckoning" (Modern French mécompter), from mes- "badly, wrongly" (see mis- (2)) + conter (see count (v.)). Related: Miscounted; miscounting.

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