The glass industry is special. there are some differences between the calculation of the practical area of glass and the general calculation method.Our tool is designed to enable users to obtain the glass area required for the project more quickly and simplify the process.Usually, the glass cutting process will lead to material return. If you cut special-shaped glass, not rectangular, then there will be residual material returns, such as triangles, circles and ellipses, which can not be reused (most of them), so the area can only be calculated by length * width, and for circular or elliptical glass, about 5cm will be added on this basis.