Modulus of elasticity is particularly important in the analysis and design of reinforced concrete structures. Several predictive formulas are recommended in different codes to find out elastic modulus of high strength concrete (HSC). This paper presents a new approach for the prediction of the elastic modulus of HSC using fuzzy models. The fuzzy models are advantageous with their ability to describe knowledge in a descriptive way in the form of simple rules by using linguistic variable only. The theory of fuzzy sets is examined in the paper and the study intensified around fuzzy modeling as a method to predict elastic modulus of HSC. A fuzzy logic algorithm was devised for estimating the elastic modulus of HSC from compressive strength. The method was also found useful to predict lower and upper bounds of elastic modulus of HSC easily where more realistic results can be obtained. (C) 2007 Elsevier Ltd. All rights reserved.