length · China / East Asia · Historical–modern

cun

approx.

Record: M221
Definition quality: Historically standardized modern 市制 reference
Conversion mode: multiplicative
Calculator: Approximately calculable

Definition

Modern 市制 uses 10 cun = 1 chi and 1 metre = 3 chi.

Approximate reference value

One cun is understood to be about 0.033333333 metres.

History & use

Modern Chinese customary 市制 makes 1 metre = 3 shìchǐ and 10 cùn = 1 chǐ. Historical cun values varied, so the calculator value must be labeled modern customary.

Modern use

Modern use is context-dependent and varies by region or measurement system.

Did you know?

Historical Chinese unit names survived into a metric-linked customary system.

Sources & evidence

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

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.