Calculation based on a root font-size of 16 pixel.

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Pixels (px) and root em (rem) are units of measurement used in web development to define sizes and dimensions.

Pixels (px): Pixels are an absolute unit of measurement that represents the smallest indivisible unit on a digital display. When you specify sizes in pixels, they remain fixed and do not change based on user settings or device properties. For example, if you set an element's font size to 16 pixels (16px), it will always be 16 pixels regardless of the user's preferences.

Root em (rem): Root em is a relative unit of measurement that is based on the font size of the root element of a web page, typically the <html> tag. The root em (rem) allows for scalable and flexible sizing because it adjusts in proportion to changes made to the base font size. If the base font size is set to 16 pixels (16px), then 1rem is equal to 16 pixels. If the base font size is increased to 20 pixels (20px), then 1rem becomes 20 pixels, and all subsequent rem values will scale accordingly.

To convert from pixels to root em, you need to know the base font size set for your website. You can then divide the pixel value by the base font size to obtain the corresponding value in root em. For example, if the base font size is 16 pixels and you have a value of 32 pixels, the conversion to root em would be 2rem since 32px / 16px = 2rem.

Using root em (rem) as a unit of measurement provides a scalable and flexible approach to designing your website, ensuring that elements adjust proportionally to changes in the base font size. This can be particularly useful for achieving responsive and accessible designs that adapt well to different devices and user preferences.

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