A detailed experimental work was carried out to find the relationship between the tensile strength of woven fabrics and the constituent yarns. One thousand and eighty fabric samples were constructed on a projectile weaving machine from 100 % cotton and polyester/cotton yarns having a blend ratio of 52:48 with yarn linear densities of 20, 25, 30 and 15, 20, 25 tex respectively. Tensile strength and other quality parameters of fabric samples and constituent yarns were measured as per standard test methods. The obtained values were analyzed to find the effect of yarn material, yarn linear density, ‘warp and filling count’ and design on the tensile strength of fabric. The selected parameters of yarn and fabric were found to have the significant effect on the tensile strength of fabric. The manufactured samples were divided into four groups according to the yarn material used in warp and weft directions. Multiple linear regression analysis was carried out by using MINITAB software to develop the relationship in both warp and weft directions for each group as well as generalized relationship for all of the fabric samples. Statistical adequacy analysis and validation of the developed relationships show a strong ability and accuracy to predict the fabric tensile strength from yarn properties and fabric construction and to determine the yarn tensile strength for a predefined tensile strength of fabric. The warp density and warp yarn strength were found to be the most dominant parameters in case of warp-way fabric strength where as the weft density and weft yarn strength were found as the most prominent parameters in case of weft-way fabric strength. Contribution of selected parameters relative to each other for fabric tensile strength was also investigated and presented in the form of a pie diagram. The developed relationships can be used accurately within the specified limits of selected variables.