The antonyms for mis-reckonings include accurate assessments, exact calculations, and precise judgments. When one accurately assesses a situation, they make a fair and reliable judgment of it. Exact calculations are precise computations that leave no room for error or misinterpretation. Precise judgments are thoughtful and well-reasoned, taking into account all the relevant factors and data available. By contrast, mis-reckonings indicate mistakes or inaccuracies in one's assessment, calculation or judgment, often leading to poor outcomes. Therefore, it is essential to strive for accuracy, exactitude, and precision when assessing situations, making calculations, or forming judgments to avoid mis-reckonings.