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Below we describe commonly used terms which describe levels of solubility. These descriptive levels can be found in literature and usually they refer to ranges of solubility listed below.
The ranges are a guideline, not fixed exact figures and are used to loosely describe solutes solubility levels rather them to separate them out into different groups.
| Descriptive Level | Parts of solvent per 1 part of solute (material) |
| Very Soluble | Less than 1 |
| Freely Soluble | From 1 to 10 |
| Soluble | From 10 to 30 |
| Sparingly Soluble | From 30 to 100 |
| Slightly Soluble | From 100 to 1000 |
| Very Slightly Soluble | From 1000 to 10,000 |
| Practically Insoluble, or Insoluble | More than 10,000 |