In this review, the parametersKand &agr; found in the literature for the Mark–Houwink–Sakurada equation relating viscosity to molecular weight have been critically evaluated for linear polyethylene, and values have been recommended for six commonly used solvents. These are decalin, 1,2,4‐tricholorobenzene, 1‐chloronaphthalene, tetralin,o‐dichlorobenzene, andp‐xylene. In addition, the literature values ofKfor several different theta solvents are presented.