The jatropha oil was extracted using solvent extraction and mechanical pressing. Thernextracted oil was refined through degumming and neutralization followed by washing andrndrying. The acid value, amount of free fatty acid, saponification value and flash point of thernextracted jatropha oil were determined. The biodiesel was produced from jatropha oil usingrnanhydrous ethanol (99.4% w/w) anhydrous NaOH catalyst (97% w/w). The experimentalrndesign was done in two parts. The first one was done for one factor of four levels to establishrnthe parameters influence independently on biodiesel yield. To determine the temperaturerneffect, experiments were done at temperatures of 35rnornornornornC, 55rnC, 65rnC and 75rnC. Similarly, to rninvestigate the effect of amount of catalyst, experiments were done at 0.25% (w/w), 0.5%rn(w/w), 1% (w/w) and 2% (w/w) of NaOH catalyst. In addition, to determine the influence ofrnmolar ratio of alcohol to oil, molar ratios of 6:1, 8:1, 10:1 and 12:1 were used. In the secondrnof the experimental design, the full factorial, was done for the three factors at two levels andrntwo replicas at a temperature of 55rnornornC and 65rnC, molar ratio of alcohol to oil 6:1 and 8:1, and rnthe amount of catalyst required was 0.5% (w/w) and 1% (w/w), which were used torninvestigate the effects of the three parameters and their interaction simultaneously onrnbiodiesel yield. It was found that the standardized effect of molar ratio of alcohol to oil hadrnthe highest effect whereas the least effect was observed at the interaction of temperature andrnalcohol. The standardized effect of the interaction of all the three parameters together wasrngreater than the temperature effect alone. The average maximum biodiesel yield was 83.6%rn(w/w) at 55rnornC, 8:1 molar ratio of alcohol to oil and 1% (w/w) NaOH catalyst amount. On the rnother hand, the average minimum biodiesel yield was 64.9% (w/w) at 65rnornC, 6:1 molar ratio rnand 0.5% (w/w) catalyst amount. The viscosity, density, flash point, acid value, saponificationrnvalue, moisture content and ash content of the produced biodiesel were determined. Thesernproperties were matched with ASTM specifications except viscosity which was slightlyrnhigher than ASTM limit.