The word "mis-calculates" means making a mistake in a calculation. Some antonyms for "mis-calculates" may include the words "accurate," "precise," "exact," "flawless," "perfect," and "correct." These words indicate a level of precision and accuracy in calculations that is free from any errors or mistakes. Antonyms for "mis-calculates" can be helpful in communicating the level of accuracy in a calculation, whether it be for math, science, or other fields that require precise measurements. Using antonyms can help clarify the intended meaning and convey a sense of confidence in the accuracy of the calculations being used.