Ppm to Mg m3, 37000ppm= mg/m3

Ppm to Mg m3, 37000ppm= mg/m3

mg/m3=M/22.4·ppm·[273/(273+T)]*（Ba/101325）
Where:
M --- is the molecular weight of the gas
Ppm --- measured volume concentration value
T --- temperature
Ba --- pressure

How to convert mg / m3 and ppm

The concentration unit ppm is the same measurement ratio, one millionth; mg / m3 is the mass volume concentration. The two can be converted. It is necessary to know the density of solute and solvent under the corresponding state (temperature and pressure). It may be misleading to read many conversion formulas

Ppm = mg / kg

Ppm is the symbol of proportion. 5ppm means 5 parts per million (just like 1% means 1%). If you still need to see the unit, it depends on what the calculation benchmark is. For example, the unit of solution is volume (cubic meter, liter... --- can be converted into volume product). If it is mass, it can also be converted into mass product