What is the ancient life calculation called?

Add up the weight of the appropriate weight, the heaviest is 72 1 money, commonly known as the emperor's life, more than 525 is called Lu Guan's life, 222 money is called San Qian's life, 222 money is called hard life, the lightest is 22 1 money is called beggar's life, and more than 322 is called good life. The method of claiming one's life can be found in the Ordinary Peasant Calendar.

Is to weigh your own life, the algorithm needs the year, month, day and hour of a person's birth, and finally add up the total.