TCM clinical and research will encounter the problem of TCM weight unit conversion, and the modern weight unit conversion is very simple. Namely: 1 kg = 2 kg, 1 kg = 10 Liang, 1 Liang = 10 Qian, 1 Qian = 5g,1g =/kloc-. Beginners and Chinese medicine lovers often have doubts about weight conversion; Some materials are misinformed, misinterpreting the nature of the country and misleading the children of the people. In view of this, a fool dared to offer suggestions and sorted out the information about weight conversion, named "TCM weight unit conversion" for netizens' reference. Limited ignorance, mistakes and omissions are inevitable, please correct me, thank you very much!

From Qin Shihuang's unified measurement to the founding of New China, China has always used the measurement method of 16 Liang per catty. Yang Hui, a mathematician in the Southern Song Dynasty, made up the Song formula of "One Jin and Two Prices" in the Daily Algorithm (1262):

"One request, every 625; Second, ask for abdication125; Three requests,1875; Four requests were changed to twenty-five; Five, three, one, two, five; Six demands, two prices, three seven five; Seven, four, three, seven, five; Eight requests turned into five. " It means that one or two equals 0.0625 Jin, and two or two equals 0. 125 Jin ... In the Yuan Dynasty, the great mathematician Zhu Shijie's book "Arithmetic Enlightenment" (1299) was promoted to the following fifteen sentences:

"One refund is 625, two stays 125, three stays 1875, four stays 25, five stays 3 125, six stays 375, seven stays 4375, eight stays single five, nine stays 5625, ten stays 625, eleven stays 6875,"

At that time, the 16-Liang scale was called the 16-Liang scale, which was composed of the Big Dipper, the six stars in Nandou and the three stars in Fulushou, warning businessmen to be honest and trustworthy and not to be bullied. Otherwise, we will lose our lives if we are short of one or two. ...

In the long historical period, great changes have taken place in weights and measures, which need to be converted according to how many grams a catty is equal to at that time. Please refer to the summary of historical weights and measures. For example, from the Qin Dynasty to the Western Han Dynasty, 1 kg was equivalent to 258.24 grams, at the beginning of Sui Dynasty 1 kg was equivalent to 668. 19 grams, and at the end of Sui Dynasty 1 kg was equivalent to 222.73 grams.

In addition, according to 1975, the Jiayou copper ruler unearthed in Xiangtan, Hunan Province, the self-recorded weight is 100 kg, and the actual weight is 64 kg. Then each catty is equivalent to 640 grams (the standard in the summary of weights and measures in previous dynasties is 596.82 grams), which is far from the 258.24 grams in the Han Dynasty.

Starting from 1959, one kilo equals twelve: 1959. On June 25th, the State Council issued the "Order on the Unified Measurement System", which determined the metric system as the basic unit of measurement in China, and popularized it throughout the country, keeping the municipal system. "The market system was originally set at 16.21 Jin, but it should be changed to 12.21 Jin because of the trouble of conversion." The measurement of traditional Chinese medicine remains unchanged.

From 0979+65438+65438 to 10, the measurement unit of traditional Chinese medicine was also changed to metric, and "grams, milligrams, liters and milliliters" were used instead of "two, money and minutes".

"Money" is converted into "grams", and the commonly used conversion method since modern times is: 500 grams (1 kg) ÷ 16 (old system 16 is a catty) ÷ 10 (old system1kg).

Summary: The ancient system of weights and measures has undergone many changes. After the Ming Dynasty, it was generally stable with little change, with a kilo of about 595 grams. Until 1929, the measurement reform was carried out, and the old system was changed from 595 grams per catty to 500 grams per catty. It should also be pointed out that in the restructuring of 1929 and 1959, the measurement of traditional Chinese medicine was treated as an exception, and the old system remained unchanged. Thus, from the Ming Dynasty to 1979, the correct formula for converting money into grams should be 595 ÷ 10, 1 money (1 money = 10), which is about 3.72 grams (3.7638).