Failure of concrete slab construction on the ground such as in warehouse floor, hangar floor, and rigid pavement structure on the highway may result in the inaccuracy of the applied design parameter analysis. The study aimed to analyze the effects of the design parameters of base ground material, concrete material, and vehicle load on slab on grade capacity using design method of Corps of Engineering (COE). The design parameter used vehicle loads of 25 Kips, 50 Kips, 75 kips, 100 kips and 120 Kips, medium quality concrete material of compressive strength concrete fc’ 20 MPa, 25 MPa, and 30 MPa as well as high quality concrete material of compressive strength concrete 35 MPa and soft base ground material (k100 Pci), medium (k 150 Pci), and hard (k 200 Pci). COE method has f(t) variables, namely concrete Modulus of Rupture (flexural strength) of 485 Psi, 542 Psi, 594 Psi, 641 Psi, vehicle axle load of 25 Kips, 50 Kips, 75 Kips, modulus of base ground reaction of k 100 Pci, 150 Pci, and 200 Pci, the number of passing vehicles of 5 million. The making of Taufik Costarico Slab On Grade (TCSOG) Program was carried out by preparing nomogram drawing digitization using autocad program, finding out the equation of lines in the excel program, and finally having it created using visual basic program. With the help of TaufikCostarico slab on grade program, there obtained 60 thicknesses of concrete slab on grade. The result of the study showed that the more the vehicle load was, the thicker the concrete plate would be. In contrast, the harder the base ground was, the thinner the concrete plate had to be. In conclusion, the high concrete quality of fc’ 35 MPa, hard ground of k 200 Pci, and concrete slab on grade thickness of 101.6 mm (4 in) are the same for vehicle loads of 25 kips, 50 kips, 75 kips, 100 kips and 120 kips.