Abstract: This paper presents the compliance equations for rectangular single-axis hinges and right circular hinges. The equations are given in closed-form and concise expressions so that they are handy for design. Comparison is made between the present equations and those of widely used J. M. Paros' equations. Results indicate that the present equations are simple and effective, particularly for the right circular hinges. Some suggestions are made in regard to the design of flexure hinges.