For cloud liquid water in ERA5 there are 2 variables:

- Specific cloud liquid water content (code 246) on pressure (and model) levels. This parameter has units of kg kg
^{-1}, see Table 9 in the ERA5 data documentation. You can convert the units of this parameter to kg m^{-3}by multiplying by the density (=P/RT, where P is pressure, T is the absolute temperature and R is the specific gas constant). - Total column cloud liquid water (code 78) on surface and single levels. This parameter has units of kg m
^{-2}, see Table 6 in the ERA5 data documentation. These units occur because a vertical integral has been performed.

Thanks,

Kevin