The word "mis calculated" means that an error has been made in a calculation or estimate. The antonyms for "mis calculated" can vary depending on the context in which the word is used. A few possible antonyms for "mis calculated" could be accurately calculated, precisely estimated, correctly gauged, or precisely measured. These antonyms all suggest that there has been a deliberate effort to ensure that the calculation or estimate is as accurate as possible. By using antonyms such as these, one can convey a sense of confidence in the precision and accuracy of the calculation or estimate.