A work has carried out to estimate the probable range of tensile and flexure strength of a Jute/Polyester composite. The composite specimens of different thickness and different fiber volume fractions were studied. The composite of 4.1 mm thick 24.39% fiber volume fraction has shown highest tensile strength and 3.48 mm thick 15.62% fiber volume fraction has shown highest flexural strength. Both these mechanical properties of Jute/Polyester composite follow normal distribution is also presented. More than 95% probable range of tensile strength of 4.1 mm thick 24.39% fiber volume fraction and flexural strength of 3.48 mm thick 15.62% fiber volume fraction are between 33.5 MPa to 42.0 MPa and 190 MPa to 275 MPa respectively. © 2017 Elsevier Ltd.