One concentration, several ways to express it
A gas concentration can be expressed either in a weight-per-volume unit, by example µg/m3 or mg/m3, or in a volume-per-volume unit, by example ppb or ppm.
The magnitude of a specific concentration depends on the chosen unit, the type of gas, and the base for normalization. The latter is a convention to express a weight-per-volume concentration at a standardized temperature and pressure different from the actual conditions where the gas resides. A few different standards exist and are applied in different contexts.
The relation between the magnitudes for the two types of concentration units is fixed for a given gas and normalization base. This enables the conversion of gas concentrations between weight-per-volume and volume-per-volume units, as in this concentration converter.
Hints:
You can use both point and comma as decimal marker. If you use a comma, the result will be presented with a decimal comma if needed, otherwise with a decimal point. Do not use comma as a thousands separator, it will be interpreted as a decimal marker.
The result is displayed rounded to the same number of value digits as you enter. Fill out with zeros if you wish more digits in the result. Setting aside the theoretical aspect of the conversion factors, the result is valid up to five value digits.
Need to enter the result in a spreadsheet or similar? The usual copy-paste methods work fine!
Disclaimer:
This conversion service is provided as-is and for convenience only. By using the converter, you accept and agree that OPSIS shall not be held liable for any produced result or lack of result. Also note that he underlying calculations assume that the gases behave as ideal gases with a fixed molar volume of 22.414 m3/kmol at 0 °C and 101.325 kPa and corresponding values at the other normalization bases. This is often close-enough to the actual behaviour of the gases and thereby the default method to convert between concentration units. However, slightly different molar volumes might apply to a few gases under certain standards, rules and regulations. The converter does not address any such deviations from the ideal molar volume at the respective normalization base.