Mis-calculation refers to an erroneous math or estimation that proves wrong. Its antonyms, therefore, refer to accurate calculations, foresight, and judicious planning. Examples of antonyms include proper calculation, accurate estimation, apposite judgment, prudence, careful consideration, astuteness, and circumspection. In contrast to mis-calculation, these words embody characteristics of accuracy, precision, level-headedness, and vigilance. Their usage implies the ability to weigh various possible outcomes, make sound judgments, and execute plans successfully. In essence, mis-calculation and its antonyms represent the balance between error and correctness in decision-making and planning.