units_concentration(3)

units::concentration(3) Unit Conversion and Dimensional Analysis Library units::concentration(3)

NAME

units::concentration - namespace for unit types and containers representing concentration values

SYNOPSIS

Typedefs

Units (full names plural)



typedef unit< std::ratio< 1, 1000000 >, units::category::scalar_unit > parts_per_million


Units (full names singular)



typedef parts_per_million ppm


Unit Containers



typedef unit_t< ppm > ppm_t
typedef unit_t< ppb > ppb_t
typedef unit_t< ppt > ppt_t
typedef unit_t< percent > percent_t


Functions


std::ostream & operator<< (std::ostream &os, const ppm_t &obj)
std::string to_string (const ppm_t &obj)
std::ostream & operator<< (std::ostream &os, const ppb_t &obj)
std::string to_string (const ppb_t &obj)
std::ostream & operator<< (std::ostream &os, const ppt_t &obj)
std::string to_string (const ppt_t &obj)
std::ostream & operator<< (std::ostream &os, const percent_t &obj)
std::string to_string (const percent_t &obj)

Detailed Description

namespace for unit types and containers representing concentration values

The SI unit for concentration is parts_per_million, and the corresponding base_unit category is scalar_unit.

See also

See unit_t for more information on unit type containers.

Author

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Wed Feb 11 2026 09:38:34 Version 2.3.0