Cuo (unit) explained

A Cuo in China or sai in Japan is a unit of volume measurement.^[1] One cuo equals 1⁄1000 sheng.It is 1 mL (millilitres) in China^[2] and 1.804 mL in Japan.

The word cuo means (a) to pick up (e.g., salt) using one's fingertips, or (b) the small amount of something that can be picked up in this way.

China

Volume units effective since 1930 in China^[3]

Pinyin	Character	Relative value	Metric value	US value	Imperial value	Notes
cuō	Chinese: '''撮'''		1 mL	0.0338 fl oz	0.0352 fl oz	millilitre
sháo	Chinese: 勺		10 mL	0.3381 fl oz	0.3520 fl oz	centilitre
gě	Chinese: 合		100 mL	3.381 fl oz	3.520 fl oz	decilitre
shēng	Chinese: 市升	1	1 L	2.113 pt	1.760 pt	litre
dǒu	Chinese: 市斗	10	10 L	21.13 pt 2.64 gal	17.60 pt 2.20 gal	decalitre
dàn	Chinese: 市石	100	100 L	26.41 gal	22.0 gal	hectolitre

Japan

Volume

Unit!rowspan="2"

Shō	Metric		US		Imperial
Romanized	Kanji	Exact	Approx.	Exact	Approx.	Exact	Approx.
Sai	Japanese: '''才'''		L	1.804mL	cuyd	29.28min	gal	30.47min
0.1101cuin
Shaku	Japanese: 勺		L	18.04mL	cuyd	0.6100floz	gal	0.6349floz
1.101cuin
Gō	Japanese: 合		L	180.4mL	cuyd	0.3812pt	gal	0.3174pt
0.3276drypt
Shō	Japanese: 升	1	L	1.804L	cuyd	1.906qt	gal	1.587qt
1.638dryqt
To	Japanese: 斗	10	L	18.04L	cuyd	4.765gal	gal	3.968gal
2.048pk
Koku	Japanese: 石	100	L	180.4L	cuyd	47.65gal	gal	39.680gal
5.119bu
Notes: Approximations are rounded to four significant figures.

For more details, please see Sheng (volume)

See also

• Chinese units of measurement
• Japanese units of measurement

Notes and References

1. https://en.wiktionary.org/wiki/撮
2. Book: Language Institute, Chinese Academy of Social Sciences . zh:现代汉语词典 (附錄：計量單位表) . Contemporary Chinese Dictionary (Appendix: Measure units) . . 2016 . 978-7-100-12450-8 . 7th . Beijing . zh. 1786-1793.
3. Web site: The Weights and Measures Act (1929) . https://web.archive.org/web/20140425025351/http://lis.ly.gov.tw/lghtml/lawstat/version2/01926/0192618020200.htm . dead . 2014-04-25 . . Chinese.