length · China / East Asia · Historical–modern

chi

approx.

Record: M222
Definition quality: Historically standardized modern 市制 reference
Conversion mode: multiplicative
Calculator: Approximately calculable

Definition

Republican-era customary reform established 1 market chi = 1/3 metre; later government sources retain the conversion.

Reference value

One chi is understood to be about 0.33333333 metres.

Modern use

Modern-use scope is context-dependent; the website should follow the record's current-status and regional/system labels rather than imply universal use.

Did you know?

The same name spans many dynastic values, so the era label is essential.

Sources & evidence

Source tier Tier B/C — recorded secondary/reference source · confidence High

Related measurements

metre

length · International · Modern

SI base unit of length. Its definition fixes the speed of light in vacuum at exactly 299,792,458 m/s, with the second defined from the caesium-133 hyperfine frequency.