I'm not familiar with the "MUT", but I feel confident that you cannot calculate anyone's "level of morality" with any test. At best you can identify their moral developmental level in moral reasoning, such as conventional or postconventional in Kohlberg's scheme, or their preferences for different "moral foundations" in Haidt's scheme, or whether they choose utilitarian or deontological responses to moral dilemmas given certain conditions, or the extent to which they give priority to intentions in assigning blame. But none of these is a measure of "morality" per se, because there is no universally accepted definition.