The two mol-ecules in the asymmetric unit of the title compound, C(13)H(16)O(2), form dimers through O-H⋯O hydrogen bonding, resulting in R(2) (2)(8) rings. Each carboxyl- O atom is involved in inter-amolecular C-H⋯O hydrogen bonds, forming five-membered rings. There exist dissimilar dihedral angles within the two mol-ecules, for example the carboxylate and isopropyl groups make dihedral angles of 59.6 (4) and 71.7 (3)° in the two molecules. There are no intermolecular π inter-actions.