Editing Module:Convert/documentation/conversion data (section)

== Input multiples ==
The following tables define composite input units consisting of multiple unit codes. A composite must consist of two unit codes where the second is a subdivision of the first. In addition, a default output must be specified. Optionally, an alternate unit code or name can be specified. An alternate unit must have the same scale as that of the subdivision, but may have a different name or symbol.

If both an alternate unit and name are provided, the unit will be used when the input consists of only two components, and the alternate name will be used with three or more (generally, the alternate name would be shorter than the unit's standard name or symbol, and that may be desirable when three or more units make up an input composite).

If an alternate name is used, it replaces the unit's symbol and name and plural name. In other words, the same alternate name applies regardless of whether the unit is abbreviated, and regardless of the number of units.

If the unit <code>yd</code> allows <code>ft</code> as a subdivision, and <code>ft</code> allows <code>in</code>, then the input to a conversion can use all three units (for example, <code>&#123;{convert|1|yd|2|ft|3|in}}</code> which specifies the input as 1&nbsp;yard, 2&nbsp;feet, 3&nbsp;inches). There is no limit to the number of units that can be used in an input multiple.

To simplify processing by the script which extracts data from this wikitext, a unit code is required in the first column; that unit code is not used. This section is read after all units and combinations are defined, so the unit codes may refer to items defined anywhere on this page.

=== Area ===
{| class="wikitable" style="text-align: center;"
!Composite code !!Unit code !!Unit code !!Default !!Alternate !!Name
|-
| _acre_rood || acre || rood || ha ||  ||
|-
| _acre_sqperch || acre || sqperch || ha ||  ||
|-
| _rood_sqperch || rood || sqperch || m2 ||  ||
|}

=== Length ===
{| class="wikitable" style="text-align: center;"
!Composite code !!Unit code !!Unit code !!Default !!Alternate !!Name
|-
| _ch_ft || ch || ft || m ||  ||
|-
| _ch_yd || ch || yd || m ||  ||
|-
| _chain_ft || chain || ft || m ||  ||
|-
| _chain_yd || chain || yd || m ||  ||
|-
| _foot_in || foot || in || m ||  ||
|-
| _ft_in || ft || in || m ||  ||
|-
| _mi_ch || mi || ch || km ||  ||
|-
| _mi_chlk || mi || chlk || km ||  ||
|-
| _mi_chain || mi || chain || km ||  ||
|-
| _mi_chainlk || mi || chainlk || km ||  ||
|-
| _mi_ft || mi || ft || km ||  ||
|-
| _mi_furlong || mi || furlong || km ||  ||
|-
| _mi_yd || mi || yd || km ||  ||
|-
| _smi_chain || smi || chain || km ||  ||
|-
| _yd_ft || yd || ft || m ||  ||
|}

=== Mass ===
{| class="wikitable" style="text-align: center;"
!Composite code !!Unit code !!Unit code !!Default !!Alternate !!Name
|-
| _lb_oz || lb || oz || kg ||  ||
|-
| _Lcwt_qtr || Lcwt || qtr || kg ||  ||
|-
| _Lcwt_st || Lcwt || st || kg ||  ||
|-
| _long_cwt_qtr || long cwt || qtr || kg ||  ||
|-
| _LT_Lcwt || LT || Lcwt || t || -Lcwt ||
|-
| _lt_Lcwt || lt || Lcwt || t || -Lcwt ||
|-
| _qtr_lb || qtr || lb || kg ||  ||
|-
| _st_lb || st || lb || kg lb ||  ||
|-
| _ST_Scwt || ST || Scwt || t || -Scwt ||
|}