[#mp_units-ppm]
= xref:mp_units.adoc[mp&lowbar;units]::ppm
:relfileprefix: ../
:mrdocs:

Alias for `parts&lowbar;per&lowbar;million`

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;unit&lowbar;conversion&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
inline constexpr auto ppm = parts&lowbar;per&lowbar;million;
----


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