Felicific calculus
（重定向自Utility calculus）
The felicific calculus is an algorithm formulated by utilitarian philosopher Jeremy Bentham (1748-1832) for calculating the degree or amount of pleasure that a specific action is likely to cause. Bentham, an ethical hedonist, believed the moral rightness or wrongness of an action to be a function of the amount of pleasure or pain that it produced. The felicific calculus could, in principle at least, determine the moral status of any considered act. The algorithm is also known as the utility calculus, the hedonistic calculus and the hedonic calculus.