5 px converts to approximately 0.3125 css units.
This conversion is based on the common CSS unit “rem”, where typically 1 rem equals 16 pixels in many browsers by default. So to convert pixels to css rem units, you divide the pixel value by 16. This makes scaling consistent across different screen sizes and user settings.
Conversion Tool
Result in css:
Conversion Formula
The formula to convert pixels (px) into CSS rem units is:
css rem = px ÷ 16
This works because 1 rem, the root em unit, typically equals 16 pixels in browsers. By dividing the pixel value by 16, you get the equivalent size in rem units that scale relative to the root font size.
Example calculation for 5 px:
- Start with 5 pixels.
- Divide by 16 (the base font size in px): 5 ÷ 16 = 0.3125.
- The result is 0.3125 rem.
Conversion Example
- Convert 8 px to css rem:
- Divide 8 by 16.
- 8 ÷ 16 = 0.5 rem.
- So, 8 px equals 0.5 rem.
- Convert 12 px:
- 12 ÷ 16 = 0.75 rem.
- This means 12 px is 0.75 rem.
- Convert 20 px:
- 20 ÷ 16 = 1.25 rem.
- So, 20 px equals 1.25 rem.
- Convert 0 px:
- 0 ÷ 16 = 0 rem.
- Zero pixels equal zero rem.
- Convert 15 px:
- 15 ÷ 16 = 0.9375 rem.
- Thus, 15 px is 0.9375 rem.
Conversion Chart
| Pixels (px) | CSS rem |
|---|---|
| -20.0 | -1.2500 |
| -15.0 | -0.9375 |
| -10.0 | -0.6250 |
| -5.0 | -0.3125 |
| 0.0 | 0.0000 |
| 5.0 | 0.3125 |
| 10.0 | 0.6250 |
| 15.0 | 0.9375 |
| 20.0 | 1.2500 |
| 25.0 | 1.5625 |
| 30.0 | 1.8750 |
This chart shows pixel values on the left and their converted rem values on the right. You read the px value to find its equivalent rem by dividing by 16. Use this chart to quickly find conversions for sizes without calculating each time.
Related Conversion Questions
- How many css rem units are in 5 px?
- What’s the rem equivalent of 5 pixels for font sizing?
- Is 5 px equal to 0.3125 rem in CSS?
- How do I convert 5 px to CSS rem for responsive design?
- Why do I divide 5 px by 16 to get rem units?
- Can 5 px be converted to em or only rem in CSS?
- What CSS unit corresponds to 5 px when using rem scaling?
Conversion Definitions
px: A pixel (px) is a unit of measurement in digital graphics and web design that represents a single dot on a screen. Its physical size varies depending on device resolution and display density, but in CSS, it is a fixed unit used for precise layout control.
css: CSS (Cascading Style Sheets) is a stylesheet language used to control the presentation of HTML elements on a webpage. It allows designers to specify sizes, colors, fonts, layouts using units like rem, em, px, and percentages to make pages adapt well across devices.
Conversion FAQs
Can I use px instead of rem for all CSS sizing?
You can use px for fixed sizes, but it doesn’t scale well for accessibility or responsiveness. Rem units adapt based on the root font size, making layouts more flexible and user-friendly, especially on different devices or user settings.
Why is 16 px the standard base for rem conversions?
Most browsers set the default font size at 16 pixels. Using 16 as the base makes rem units predictable and consistent across browsers, so dividing px by 16 gives a rem value relative to the root font size.
Does the px to rem conversion change if I change the root font size?
Yes. If the root font size changes from 16 px to another value, then the conversion factor changes accordingly. For example, if root font size is 20 px, then 5 px equals 5 ÷ 20 = 0.25 rem, not 0.3125.
Is the conversion formula the same for em units?
Not quite. Em units are relative to the font size of the parent element, so their conversion depends on context. Rem is always relative to the root, making conversions straightforward using the root font size.
What happens if I convert negative pixel values to rem?
Negative pixel values converted to rem will also be negative rem values, calculated by dividing the negative px value by 16. This can be useful for positioning or offsets in CSS but should be used cautiously.