How to convert from inch to pixel
The units of an element's CSS property are pixels. For example, the background-image property can specify the number of different image formats (such as PNG, JPG, and GIF) or none at all. The font-size property specifies the size of the text in pixels. The length and width properties are used to set the size of an element's content area and padding areas respectively. The height property sets the height of the visible area of an element.
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pixel to inches
Assuming the pixel density is 96 dpi, there are 96 pixels per inch.
Than 1 pixel = (1 / 96) inches.In this example, the body has a font size of 16 pixels, which is larger than any other element on the page by at least 1 pixel but smaller than anything else by at least 1 pixel (1em). The p element uses relative units (0.5em) so that its text is half as large as its parent element (1em).
