5 Px to CSS – Easy Conversion Explained

5 px is equal to 0.3125 css units.

The conversion from pixels (px) to css units (rem) depends on the root font size. Assuming the default root font size is 16 pixels, 5 px can be converted by dividing 5 by 16, resulting in 0.3125 rem. This unit is relative and scales better with user settings.

Conversion Tool

Conversion Formula

The formula to convert pixels to css rem units is:

css (rem) = pixels (px) / root font size (px)

Since the root font size is usually 16 pixels by default in browsers, you divide the px value by 16.

This works because rem units are relative to the root font size, so 1 rem equals the root font size. Dividing converts an absolute pixel value into a relative rem value.

Example calculation for 5 px:

• 5 px ÷ 16 px = 0.3125 rem

Conversion Example

• Convert 8 px to css:
  • Divide 8 by 16: 8 ÷ 16 = 0.5 rem
  • Result: 8 px = 0.5 rem
• Convert 12 px to css:
  • 12 ÷ 16 = 0.75 rem
  • So, 12 px equals 0.75 rem
• Convert 20 px to css:
  • 20 ÷ 16 = 1.25 rem
  • Therefore, 20 px is 1.25 rem
• Convert 0 px to css:
  • 0 ÷ 16 = 0 rem
  • Meaning 0 px is 0 rem
• Convert 15 px to css:
  • 15 ÷ 16 = 0.9375 rem
  • So, 15 px equals 0.9375 rem

Conversion Chart

You can read the chart by looking for your pixel value on the left column, then finding the corresponding rem value on the right. This helps convert px to rem quickly without calculation but assumes a 16px root font size.

Related Conversion Questions

• How many rem units is 5 px equal to if the root font size is 16px?
• What is the css equivalent of 5 pixels in rem?
• How do I convert 5px to rem for responsive design?
• Is 5 px bigger or smaller than 0.3 rem?
• Can I use rem instead of px for a 5-pixel measurement in CSS?
• What formula do I apply to convert 5px to a css unit?
• Why does 5 px equal 0.3125 rem in CSS conversion?

Conversion Definitions

px: The pixel (px) is a fixed, absolute unit of measurement used in digital screens and web design. It represents a single dot on the screen, and its size can vary depending on screen resolution and device pixel density, but it is commonly treated as a standard unit for layout and graphics.

css: CSS units like rem are relative length units used to size elements in web pages. The rem unit stands for “root em” and is relative to the root element’s font size, allowing scalable and accessible design that adapts to user preferences or different devices.

Conversion FAQs

Why do we divide pixels by 16 when converting to css units?

The division by 16 comes from the default root font size in browsers, which is 16 pixels. CSS rem units are relative to this root size, so dividing pixels by 16 converts an absolute pixel value into a relative rem value that scales with user settings.

What happens if the root font size is different than 16px?

If the root font size changes, the conversion formula must adjust accordingly. For example, if root size is 20px, then 5px would equal 5 ÷ 20 = 0.25 rem. Using the wrong root size can cause layout inconsistencies and unexpected sizing.

Can I use other relative units instead of rem for px conversion?

Yes, you can convert px to em or percentages depending on context. Em units are relative to the font size of the parent element, while rem relates to the root. Choosing between them depends on how you want your design to scale within nested elements.

Is converting px to rem better for responsive design?

Using rem units instead of px allows designs to scale with user preferences or device settings, improving accessibility and responsiveness. Fixed pixel units do not scale, which can cause layout problems on different screen sizes or when users adjust font sizes.

How precise is the px to rem conversion?

The conversion is as precise as the root font size setting. Because rem is a relative unit, rounding can occur when browsers render sizes, but using decimals like 0.3125 rem for 5 px provides good accuracy for consistent display.