This paper presents a mathematical model for calculating specular reflection of sin gle- jersey knitted fabrics using a three-dimensional analysis. A computer simulation program based on the model is developed to generate goniophotometric curves using Cartesian coordinates and Euler angles derived from the geometry of a knitted loop. Two correction factors are introduced by taking into consideration the sensor and sam ple geometry. The theoretical work is verified with a black monofilament yam with nine different values of tilted and rotated angles and two black single-jersey knitted fabrics made from monofilament yams. There is good agreement between the simulated and measured curves for both cases.