This paper presents an alternative criterion (simplified method) to determine the cohesion (c) and internal angle of friction (Φ) properties for two granular materials lightly stabilised with slag-lime and general blend (GB) cement-flyash using indirect diametral tensile (IDT) strength and unconfined compressive strength (UCS). The c and Φ values of the stabilised materials obtained based on this criterion were related to the IDT strength and UCS. The results suggest that the c and Φ can be estimated using this criterion and the c can be accurately related to either the IDT strength or UCS for lightly cementitiously stabilised granular materials. However, the IDT strength is a better characteristic than the UCS to estimate the c. In order to validate the criterion, the c and Φ obtained from the proposed criterion were input in the numerical analyses of IDT testing with Mohr — Coulomb failure criterion using FLAC2D finite difference software. The predicted tensile stress — horizontal diametrical deformation numerical results were compared with the corresponding experimental results. Based on this numerical analysis, it was found that the c and Φ parameters estimated from this method predicted the experimental results well in the elastic region but over predicted the ultimate stress.