0.5 rem equals 8 pixels (px).
Table of Contents
This conversion assumes the browser’s default font size is 16 pixels, which is the standard for most browsers unless changed by user settings or CSS. Since 1 rem equals the root element font size, 0.5 rem is half of that value, resulting in 8 px.
Conversion Tool
Result in px:
Conversion Formula
The formula to convert rem to pixels is: pixels = rem × root font size. Usually, the root font size is 16 px on most browsers, but it can be changed in CSS or user preferences.
Since rem stands for “root em,” it measures relative to the root element (html) font size. Multiplying rem value by this size gives the pixel equivalent.
Example calculation for 0.5 rem:
- Identify root font size: 16 px
- Multiply rem value by root font size: 0.5 × 16 = 8
- Result in pixels: 8 px
Conversion Example
- Convert 1.25 rem to px:
- Root font size is 16 px
- 1.25 × 16 = 20
- Result: 20 px
- Convert 2 rem to px:
- 2 × 16 = 32
- Result: 32 px
- Convert 0.75 rem to px:
- 0.75 × 16 = 12
- Result: 12 px
- Convert 3.5 rem to px:
- 3.5 × 16 = 56
- Result: 56 px
- Convert 0.1 rem to px:
- 0.1 × 16 = 1.6
- Result: 1.6 px
Conversion Chart
| Rem | Pixels (px) |
|---|---|
| -24.5 | -392.0000 |
| -23.5 | -376.0000 |
| -22.5 | -360.0000 |
| -21.5 | -344.0000 |
| -20.5 | -328.0000 |
| -19.5 | -312.0000 |
| -18.5 | -296.0000 |
| -17.5 | -280.0000 |
| -16.5 | -264.0000 |
| -15.5 | -248.0000 |
| -14.5 | -232.0000 |
| -13.5 | -216.0000 |
| -12.5 | -200.0000 |
| -11.5 | -184.0000 |
| -10.5 | -168.0000 |
| -9.5 | -152.0000 |
| -8.5 | -136.0000 |
| -7.5 | -120.0000 |
| -6.5 | -104.0000 |
| -5.5 | -88.0000 |
| -4.5 | -72.0000 |
| -3.5 | -56.0000 |
| -2.5 | -40.0000 |
| -1.5 | -24.0000 |
| -0.5 | -8.0000 |
| 0.5 | 8.0000 |
| 1.5 | 24.0000 |
| 2.5 | 40.0000 |
| 3.5 | 56.0000 |
| 4.5 | 72.0000 |
| 5.5 | 88.0000 |
| 6.5 | 104.0000 |
| 7.5 | 120.0000 |
| 8.5 | 136.0000 |
| 9.5 | 152.0000 |
| 10.5 | 168.0000 |
| 11.5 | 184.0000 |
| 12.5 | 200.0000 |
| 13.5 | 216.0000 |
| 14.5 | 232.0000 |
| 15.5 | 248.0000 |
| 16.5 | 264.0000 |
| 17.5 | 280.0000 |
| 18.5 | 296.0000 |
| 19.5 | 312.0000 |
| 20.5 | 328.0000 |
| 21.5 | 344.0000 |
| 22.5 | 360.0000 |
| 23.5 | 376.0000 |
| 24.5 | 392.0000 |
| 25.5 | 408.0000 |
The chart shows rem values in the left column and their corresponding pixel values on the right, based on 16 px root font size. Negative rem values represent negative pixel distances, which might be used in advanced CSS layouts or animations.
Related Conversion Questions
- How many pixels are in 0.5 rem if browser font size changed?
- Does 0.5 rem always equal 8 px on all devices?
- How to convert 0.5 rem to px in CSS with custom root font size?
- What affects the pixel value of 0.5 rem in responsive design?
- Is 0.5 rem smaller or bigger than 8 px on mobile screens?
- How does changing html font size impact 0.5 rem to px conversion?
- Why does 0.5 rem sometimes display differently in browsers?
Conversion Definitions
rem: A CSS unit standing for “root em,” representing relative font size to the root element (html). Rem allows consistent scaling of text and layout elements based on root font size, providing flexibility across devices and user preferences without hardcoding pixel sizes.
px: Pixel is an absolute unit measuring a single dot on the screen. It represents fixed size regardless of screen or element scaling. Pixels are the base unit of digital display but lack scalability, making them less flexible than relative units like rem in responsive design.
Conversion FAQs
Can the root font size be different from 16 px?
Yes, the root font size often set in the html or body tag can be changed by CSS. If it’s different from 16 px, rem calculations adjust accordingly. For example, if root size is 20 px, 0.5 rem equals 10 px instead of 8 px.
Why does 0.5 rem sometimes not look like 8 pixels on screen?
Because device pixel density and browser zoom levels can affect how pixels render. Also, user settings or CSS overrides can change the root font size, so 0.5 rem might not always visually equal 8 px.
Is rem better than px for font sizing?
Using rem helps maintain consistent scaling across different screen sizes and user preferences. Pixels are fixed and don’t scale, which can cause accessibility problems. Rem offers more flexibility but requires understanding root font size.
How do I find out my browser’s root font size?
You can inspect the html element in developer tools or check computed styles. It’s default 16 px unless modified by CSS or user settings. Some browsers allow zooming which changes the effective root font size.
Can rem units be negative?
Yes, rem values can be negative in CSS, often for positioning or transformations. Negative rem values convert to negative pixel values, which might move elements outside visible areas or create special visual effects.