A load-independent creep constraint parameter R * was proposed, and its load-independence was validated using finite element results in previous studies. A fixed distance r=0.2mm from a crack tip is chosen to define the R * , and the R * at steady-state creep can be used to evaluate constraint level with little conservatism for whole creep time. The R * can be used for ranking constraint levels for different specimens or components, and for predicting constraint-dependent creep crack growth rates. The constraint-dependent creep crack growth rate equations of a Cr–Mo–V steel have been obtained, and it may be used in creep life assessments.