Is Utilitarianism based on Calculations or Calculus?

Question

I have been going through the Justice lecture series by Harvard and noticed one thing whenever there was reference to Utilitarianism and it's related phenomena like cost-benefit analysis the word calculus was being used by the professor instead of calculations? Having no prior experience in Philosophy I am not sure if this is something which is generally taken for granted or does calculus here really refer to the mathematical foundation of calculus?

Answer 1

It does not refer to the infinitesimal calculus.

See Jeremy Bentham: Felicific Calculus and Felicific Calculus:

"The felicific calculus is an algorithm formulated by utilitarian philosopher Jeremy Bentham (1747–1832) for calculating the degree or amount of pleasure that a specific action is likely to cause."

See also Ethical calculus.