Editing Template:Convert/doc (section)

===Units of difference: Expressing a change or difference in temperature<span class="anchor" id="Units of difference"></span>===
We have already discussed standard temperature conversions (°C, °F, K), as shown in these two examples:
* {{#invoke:DemoTemplate|convert|10|C}} (standard temperature conversion)
* {{#invoke:DemoTemplate|convert|10|-|15|C}} (standard temperature range conversion)

When expressing a temperature ''change'' (e.g., "The temperature ''increased'' by 10&nbsp;°C"), or when ''comparing'' temperatures (e.g., "10 to 15&nbsp;°C ''warmer''"), we cannot use the standard temperature units ({{para||C}}, {{para||F}} and {{para||K}}), which refer to points on the respective scale. Instead, we must use one of the following "units of difference": {{para||C-change}}, {{para||F-change}} and {{para||K-change}}.

Compare the following two examples with the two above:

* {{#invoke:DemoTemplate|convert|10|C-change}} increase in temperature
* {{#invoke:DemoTemplate|convert|10|-|15|C-change}} warmer than normal

To produce multiple units in the output:
* {{#invoke:DemoTemplate|convert|10|C-change|F-change K-change}} difference