Grid css calc
Use the CSS Grid Calculator to quickly visualize page layout and draw grids in a variety of ways. It provides accurate visual feedback on how text blocks and page divisions will appear within a browser window, and returns style declarations for divisions and text to copy and paste into style sheets. The Flash player plugin version 7 is required. Grids are drawn to page edges and margins when they are set, or to the dimensions of the default page, 1280 pixels wide by 1024 pixels high. The unit of measurement for text is the pixel.