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= 3.6125E-14 kilopounds per cubic inch (kips/in3) = 2.8316846592E-5 kilograms per thousand cubic feet (kg/Mft3) = 1.0E-12 kilograms per milliliter (kg/ml) = 1.0E-6 kilograms per cubic meter (kg/m3) = 1.0E-12 kilograms per cubic centimeter (kg/cm3) = 1.0E-9 grams per cubic centimeter (g/cm3) = 1.0E-6 gamma per cubic millimeter (γ/mm3) = 1.0E-7 centigrams per milliliter (cg/mL) = 1.0E-10 centigrams per cubic millimeter (cg/mm3) = 1.0E-7 centigrams per cubic centimeter (cg/cm3) = 5.0E-9 carats per cubic centimeter (cr/cm3) In relation to the base unit (kilograms per cubic meter), 1 Milligrams Per Cubic Meter = 1.0E-6 kilograms per cubic meter.ġ Milligrams Per Cubic Meter (mg/m3) to all density units When corrected to a dry gas having a specified reference CO 2 content of 12 volume %.DENSITY's base unit: kilograms per cubic meter (Non-SI/Derived Unit) = measured concentration of a dry gas having a measured volume % CO 2Īs an example, a measured particulates concentration of 200 mg/m 3 in a dry gas that has a measured 8 volume % CO 2 is: = corrected concentration of a dry gas having a specified reference volume % CO 2 At an ambient sea level atmospheric pressure of 1 atm (101.325 kPa or 1.01325 bar), the general equation is: The conversion equations depend on the temperature at which the conversion is wanted (usually about 20 to 25 ☌).
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This article presents methods for converting concentrations from ppmv to mg/m 3 (and vice versa) and for correcting the concentrations to the required reference conditions.Īll of the concentrations and concentration corrections in this article apply only to air and other gases. Some express the concentrations as ppmv ( parts per million by volume) and some express the concentrations as mg/m 3 (milligrams per cubic meter), while others require adjusting or correcting the concentrations to reference conditions of moisture content, oxygen content or carbon dioxide content.
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Such regulations involve a number of different expressions of concentration. Regulations that define and limit the concentration of pollutants in the ambient air or in gaseous emissions to the ambient air are issued by various national and state (or provincial) environmental protection and occupational health and safety agencies. Air pollutant concentrations, as measured or as calculated by air pollution dispersion modeling, must often be converted or corrected to be expressed as required by the regulations issued by various governmental agencies.