Conversion Table
Root Em | Pixels |
---|---|
0.01rem | 0.16px |
0.03rem | 0.5px |
0.05rem | 0.8px |
0.08rem | 1.3px |
0.1rem | 1.6px |
0.15rem | 2px |
0.2rem | 3px |
0.5rem | 8px |
0.625rem | 10px |
0.75rem | 12px |
0.875rem | 14px |
1rem | 16px |
1.125rem | 18px |
1.25rem | 20px |
1.375rem | 22px |
1.5rem | 24px |
1.625rem | 26px |
1.75rem | 28px |
1.875rem | 30px |
2rem | 32px |
2.125rem | 34px |
2.25rem | 36px |
2.375rem | 38px |
2.5rem | 40px |
2.625rem | 42px |
2.75rem | 44px |
2.875rem | 46px |
3rem | 48px |
3.125rem | 50px |
3.25rem | 52px |
3.375rem | 54px |
3.5rem | 56px |
3.625rem | 58px |
3.75rem | 60px |
3.875rem | 62px |
4rem | 64px |
5rem | 80px |
6rem | 96px |
8rem | 128px |
10rem | 160px |
15rem | 240px |
20rem | 320px |
30rem | 480px |
40rem | 640px |
50rem | 800px |
60rem | 960px |
80rem | 1280px |
100rem | 1600px |
Differences Between rem and px
Root Em (rem) is a relative unit that scales according to the root element's font size, typically the HTML element. Pixels (px) are a fixed unit of measurement commonly used in digital displays. This makes rem more flexible for responsive design compared to px.
Advantages of Using rem
Using rem units allows for better scalability and consistency across different screen sizes and resolutions. Since rem is relative to the root element's font size, adjusting the font size of the root element will proportionally scale all elements using rem units. This is particularly useful for responsive design and accessibility, as it respects user preferences for font size.
How to Convert rem to px
To convert rem to pixels, you need to know the root element's font size. By default, most browsers set the root font size to 16px. The formula for conversion is:
px = rem * root font size
For example, to convert 2rem to pixels:
2rem * 16px = 32px
Frequently Asked Questions
Why should I use rem instead of px?
Using rem allows for more scalable and consistent layouts. It ensures that your design can adapt to different screen sizes and user settings, improving accessibility.
How do I set the root font size?
You can set the root font size using CSS on the HTML element. For example:
html {
font-size: 16px;
}
Can I use rem for all elements?
Yes, you can use rem for most elements to ensure consistency. However, for fine-tuning certain elements, you might still use other units like em or px.