Concentration Unit Conversion | GASTEC CORPORATION

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Concentration unit conversion

Concentration unit conversion

Converts gas concentration units to other units.

Input data

Up to eight digits, including digits after the decimal point, can be entered in input fields.

Concentration

% ppm mg/m³ mg/L

Enter the concentration values and select the concentration unit from the pull-down list.

Substance name

Molecular weight

Either directly enter the name of the gas, or select it from the pull-down list. Alternatively, directly enter the molecular weight.

Temperature

ºC

If the temperature is not 20ºC, enter the temperature in the corresponding field.

Pressure

hPa(One atmospheric pressure=1013hPa)

If the pressure is not one atmospheric pressure (1013 hPa), enter the pressure in the corresponding field.

Convert gas concentration unit Clear

Gas concentration

ppm

mg/m3

mg/L

Units for measuring concentration

Common units for measuring concentration

% (percent)	This unit expresses concentration in parts per hundred (percentage) of a substance in 100mL of a medium such as air.
ppm (parts per million)	This unit that expresses concentration in parts per million is measured as the volume (denoted in litres [L]) of a substance found in 1L of a medium such as air.
mg/m3 (milligram per cubic metre)	This unit expresses the concentration in one cubic metre of air (equivalent to 1L or 1000mL) of a substance in terms of its mass (measured in milligrams). It is primarily used for particle-like substances, and only rarely for gaseous concentrations.
mg/L (milligram per litre)	This unit expresses the concentration in one litre of air (1000mL) of a substance in terms of its mass (measured in milligrams). It is generally used for measuring concentrations in liquids, and only rarely for gaseous concentrations.

Converting from one unit of concentration to another

% → ppm	ppm=%×10000 → 1ppm=0.0001%
ppm → %	%=ppm×1/10000 → 1%=10000ppm
ppm → mg/m3	mg/m3=ppm× M22.4×273(273+T)×P1013
mg/m3 → ppm	ppm=mg/m3×22.4M×(273+T)273×1013P
mg/L → %	%=mg/l×22.4M×(273+T)273×110×1013P
% → mg/L	mg/l=%×M22.4×273(273+T)×10×P1013

M: Molecular weight of a substance 22.4(L): The volume of 1 mol at 1 atmospheric pressure at 0ºC 273(K): FK stands for Kelvin, the unit used to measure thermodynamic temperature; as 0ºC corresponds to 273.15K.You simply need to add 273 to the Celsius/Centigrade value (273+T) to obtain the temperature in Kelvin 1013(hPa): One atmospheric pressure P: P denotes the atmospheric pressure at the point of measurement (hPa)

About gas detector tubes
- Gas detector tubes (and some relevant industrial standards)
- Gas sampling methods
- GASTEC quality assurance
- Detector tube calibration gas
- Additional measuring knowhow

General information on gas measurement
- Concentration unit conversion
- Calculation of the preparation conditions to be generated by the Permeater
- The Kimitsu Contaminated Vadose Zone Assessment technique
- Formaldehyde and the indoor environment
- Properties of gas