| Loschmidt constant | has symbol n0 |   | 
| has pressure 101.325 kPa |   | 
| has value 2.6867775 × 1025 m-3 |   | 
has equation   |   | 
| has uncertainty 0.0000047 × 1025 m-3 |   | 
| is named after J. Loschmidt (1821-1895) |   | 
| has proposal date 1865 |   | 
| has temperature 273.15 K |   | 
| has definition Number of molecules of an ideal gas per unit volume (2.687 × 1019 molecules per cm3). |   | 
| has definition This is the number of molecules in a cubic metre of an ideal gas at s.t.p. It is equal to the Avogadro constant divided by the molar volume. In Germany it is sometimes called Avogadro's constant. |   | 
| is an instance of physico chemical constant |   | 
| fundamental physical constant | has accuracy |   | 
| has unit |   |