Editing Chinese units of measurement (section)

=== Length ===

====Chinese length units promulgated in 1915====
{|class="wikitable"
|+ Table of Chinese length units promulgated in 1915<ref name="ROC1915" />
!Pinyin
!Character
!Relative value
!Metric value
!Imperial value
!Notes
|-
|align=center|''[[hao (length)|háo]] ''
|align=right|{{lang|zh|毫}}
|align=right|{{frac|{{val|10000}}}}
|align=right|32&nbsp;μm
|align=right|{{val|0.00126|u=in}}
|align=right|
|-
|align=center|''[[li (short)|lí]]''
|align=right|{{lang|zh|釐}} (T) or {{lang|zh|厘}} (S)
|align=right|{{frac|1000}}
|align=right|0.32&nbsp;mm
|align=right|0.0126 in
|align=right|
|-
|align=center|''[[Fen (length)|fēn]]''
|align=right|{{lang|zh-hant|分}}
|align=right|{{frac|100}}
|align=right|3.2&nbsp;mm
|align=right|0.126 in
|align=right|
|-
|align=center|''[[Cun (unit)|cùn]]''
|align=right|{{lang|zh|寸}}
|align=right|{{frac|10}}
|align=right|32&nbsp;mm
|align=right|1.26 in
|align=left|Chinese inch
|-
|align=center|''[[Chi (length)|chǐ]]''
|align=right|{{lang|zh|尺}}
|align=right|1
|align=right|0.32&nbsp;m
|align=right|12.6 in
|align=left|Chinese foot
|-
|align=center|''bù''
|align=right|{{lang|zh|步}}
|align=right|5
|align=right|1.6&nbsp;m
|align=right|5.2&nbsp;ft
|align=left|Chinese pace
|-
|align=center|''[[zhàng]]''
|align=right|{{lang|zh|丈}}
|align=right|10
|align=right|3.2&nbsp;m
|align=right|3.50 yd
|align=left|Chinese yard
|-
|align=center|''yǐn''
|align=right|{{lang|zh|引}}
|align=right|100
|align=right|32&nbsp;m
|align=right|35.0 yd
|align=right|
|-
|align=center|''[[li (Chinese unit)|lǐ]]''
|align=right|{{lang|zh|里}}
|align=right|1800
|align=right|576&nbsp;m
|align=right|630 yd
|align=left|Chinese mile, this ''li'' is not the small ''li'' above,<br /> which has a different [[Chinese character|character]] and [[tone (tonal language)|tone]]
|}

====Chinese length units effective in 1930====
[[File:ROC1929-02-20國民政府公報97.pdf|thumb|Chinese measurement law in 1929, effective 1 January 1930]]
[[File:Chinese-measuring-tape.jpg|thumb|Chinese measuring tape]]

{|class="wikitable"
|+ Table of Chinese length units effective in 1930<ref name="ROC1930" />
!Pinyin
!Character
!Relative value
!Metric value
!Imperial value
!Notes
|-
|align=center|''[[hao (length) |háo]] ''
|align=right|{{lang|zh|毫}}
|align=right|{{frac|10 000}}
|align=right|{{frac|33|1|3}}&nbsp;μm
|align=right|{{val|0.00131|u=in}}
|align=left|Chinese mil
|-
|align=center|''[[li (short) |lí]]''
|align=right|{{lang|zh|釐}} (T) or {{lang|zh|厘}} (S)
|align=right|{{frac|1000}}
|align=right|{{frac|3}}&nbsp;mm
|align=right|0.0131 in
|align=left|Chinese calibre
|-
|align=center|''[[Fen (length)|fēn]]''
|align=right|{{lang|zh-hant|市分}}
|align=right|{{frac|100}}
|align=right|{{frac|3|1|3}}&nbsp;mm
|align=right|0.1312 in
|align=left|Chinese line
|-
|align=center|''[[Cun (unit)|cùn]]''
|align=right|{{lang|zh|市寸}}
|align=right|{{frac|10}}
|align=right|{{frac|3|1|3}}&nbsp;cm
|align=right|1.312 in
|align=left|Chinese inch
|-
|align=center|''[[Chi (length)|chǐ]]''
|align=right|{{lang|zh|市尺}}
|align=right|1
|align=right|{{frac|33|1|3}}&nbsp;cm
|align=right|13.12 in
|align=left|Chinese foot
|-
|align=center|''[[zhàng]]''
|align=right|{{lang|zh|市丈}}
|align=right|10
|align=right|{{frac|3|1|3}}&nbsp;m
|align=right|3.645 yd
|align=left|Chinese yard
|-
|align=center|''yǐn''
|align=right|{{lang|zh|引}}
|align=right|100
|align=right|{{frac|33|1|3}}&nbsp;m
|align=right|36.45 yd
|align=left|Chinese chain
|-
|align=center|''[[li (Chinese unit)|lǐ]]''
|align=right|{{lang|zh|市里}}
|align=right|1500
|align=right|500 m
|align=right|546.8 yd
|align=left|Chinese mile, this ''li'' is not the small ''li'' above,<br /> which has a different [[Chinese character|character]] and [[tone (tonal language)|tone]]
|}

====Metric length units====
The Chinese word for [[metre]] is {{lang|zh|米}} ''mǐ''; this can take the [[Chinese numerals#SI prefixes|Chinese standard SI prefixes]] (for "kilo-", "centi-", etc.). A [[kilometre]], however, may also be called {{lang|zh|公里}} ''gōnglǐ'', i.e. a metric ''[[li (Chinese unit)|lǐ]]''.

In the engineering field, traditional units are rounded up to metric units. For example, the Chinese word {{lang|zh|絲}} (T) or {{lang|zh|丝}} (S) ''sī'' is used to express 0.01&nbsp;mm.
{|class="wikitable"
|+ Table of Chinese length units in engineering
!Pinyin
!Character
!Relative value
!Metric value
!Imperial value 
!Notes
|-align=right
|align=center|''hū''
|{{lang|zh|忽}}||{{frac|{{val|1000000}}}}||1&nbsp;μm||
|align=left|Authorized name: {{lang|zh|微米}}
|-align=right
|align=center|''[[Si (length)|sī]]''
|{{lang|zh|絲}} (T) or {{lang|zh|丝}} (S)||{{frac|{{val|100000}}}}||10&nbsp;μm||
|align=left|Authorized name: {{lang|zh|忽米}}
|-align=right
|align=center|''[[hao (length) |háo]]''
|{{lang|zh|毫}}||{{frac|{{val|10000}}}}||100&nbsp;μm||
|align=left|Authorized name: {{lang|zh|絲米}} (T) or {{lang|zh|丝米}} (S)
|-align=right
|align=center|''[[li (short) |lí]]''
|{{lang|zh|釐}} (T) or {{lang|zh|厘}} (S)||{{frac|1000}}||1&nbsp;mm||
|align=left|Authorized name: {{lang|zh|毫米}}
|-align=right
|align=center|''[[fen (length)|fēn]]''
|{{lang|zh|公分}}||{{frac|100}}||10&nbsp;mm||
|align=left|Authorized name: {{lang|zh|釐米}}(T) or {{lang|zh|厘米}}(S)
|-align=right
|align=center|''[[Cun (unit)|cùn]]''
|{{lang|zh|公寸}}||{{frac|10}}||100&nbsp;mm||
|align=left|Authorized name: {{lang|zh|分米}}
|-align=right
|align=center|''[[Chi (length)|chǐ]]''
|{{lang|zh|公尺}}||1||1&nbsp;m||
|align=left|Authorized name: {{lang|zh|米}}
|-align=right
|align=center|''[[Zhàng]]''
|{{lang|zh|公丈}}||10||10&nbsp;m||
|align=left|Authorized name: {{lang|zh|十米}}
|-align=right
|align=center|''yǐn''
|{{lang|zh|公引}}||100||100&nbsp;m||
|align=left|Authorized name: {{lang|zh|百米}}
|-align=right
|align=center|''[[li (Chinese unit)|lǐ]]''
|{{lang|zh|公里}}||1000||1000&nbsp;m||
|align=left|this ''li'' is not the small ''li'' above,<br /> which has a different [[Chinese character|character]] and [[tone (tonal language)|tone]]
|}

==== Hong Kong and Macau length units ====
{|class="wikitable"
|+ Table of Chinese length units in Hong Kong<ref name="HK" /> and Macau<ref name="MO" />
![[Jyutping]]
!Character
!English
!Portuguese
!Relative value
!Metric value
!Imperial value
!Notes
|-
| align="center" |''[[Fen (length)|fan1]]''
| align="right" |{{lang|zh-hant|分}}
| align="center" |''fan''
|align=left|condorim
|align=right|{{frac|100}}
|align=right|{{val|3.71475|u=mm}}
|align=right|0.1463 in
|align=right|
|-
| align="center" |''[[Cun (unit)|cyun3]]''
| align="right" |{{lang|zh|寸}}
| align="center" |''[[Cun (unit)|tsun]]''
|align=left|ponto
|align=right|{{frac|10}}
|align=right|{{val|37.1475|u=mm}}
|align=right|1.463 in
|align=right|Hong Kong and Macau inch
|-
| align="center" |''[[Chi (unit) |cek3]]''
| align="right" |{{lang|zh|尺}}
| align="center" |''[[chi (length)|chek]]''
|align=left|côvado
|align=right|1
|align=right|{{val|371.475|u=mm}}
|align=right|1.219&nbsp;ft
|align=left|Hong Kong and Macau foot
|}

These correspond to the measures listed simply as "China" in ''The Measures, Weights, & Moneys of All Nations''
<ref>{{citation
|author = W. S. B. Woolhouse
|author-link = Wesley S. B. Woolhouse
|title = The Measures, Weights, & Moneys of All Nations (And an Analysis of the Christian, Hebrew, and Mahometan Calendars)
|year=1859
|publisher = J. Weale
|url=https://babel.hathitrust.org/cgi/pt?id=uc1.b4252729;view=1up;seq=71
}}</ref>