A method is presented to predict the surface tension and contact angle for Newtonian fluids by measuring either the shape of a small droplet on a solid surface or the shape of a small bubble attached to a solid surface in the fluid. Bubble shape can be calculated theoretically under stable condition from the point of view of the momentum balance and force balance along the interface for given physical properties and conditions such as surface tension, density and gravity. Optimizing of three non-dimensional parameters (the Bond number, the ratio of height to contact radius, b/a, and a shift factor to adjust the origin point) for the numerical analysis is carried out until the experimental interface shape coincides well with the numerical results within a given tolerance. It was found that obtained the surface tension and contact angles obtained agreed well with values reported in the literature.