"Calculating on" implies that one is considering and analyzing a situation to make a decision or take action. Some antonyms for this phrase could be spontaneous, impulsive, or reckless. These words suggest acting without careful thought or planning. Other antonyms include uninformed, unprepared, or haphazard, indicating a lack of knowledge or foresight in decision-making. These alternatives are often associated with negative outcomes, such as poor judgment or unintended consequences. In contrast, "calculated on" implies that a deliberate and reasoned process has been used to arrive at a conclusion. This method is often associated with success and positive outcomes.