Reliable equations were offered to predict leaf area for Trigonella foenum. Lamina width, length and leaf area were measured without destroying plant to develop the models. All equations produced for leaf area were derived as affected by leaf length and leaf width. As a result of ANOVA and multi-regression analysis, it was found that there was close relationship between actual and predicted growth parameters. The produced leaf area prediction models in the present study are LA= (a) + (b x L) + (c x W) where LA is leaf area, W is leaf width, L is leaf length and a, b, c are co-efficiencies. R-2 values and standard errors were found to be significant at the p<0.001 significance level.