Trust has no fixed units yet is measurable by context-specific worthwhileness, like information.

Evidence

Sixthly, even though there are no obvious units in which trust can be measured, this does not matter, because in any given context you can measure its value, its worthwhileness (see below). In this respect, trust is not dissimilar to commodities such as knowledge or information. — Diego Gambetta, Trust - Making and Breaking Cooperative…, 789

Categorization

• DEFINE: Frames trust as a commodity comparable to knowledge and information — the chapter’s thesis in miniature.