Converting REM to PX and PX to REM
The REM to PX Converter is a CSS unit converter tool that helps you convert REM (Root Em) units to PX (Pixels) and vice versa. This tool is especially useful for frontend developers and designers who work with responsive design, as it helps convert between relative and absolute units. Simply input your value, set the base font size, and the conversion happens instantly.
REM to PX
Example: 1rem × 16px = 16px
PX to REM
Example: 24px ÷ 16px = 1.5rem
What is REM and PX in CSS?
PX (Pixels) is an absolute unit of measurement in CSS. One pixel is always the same size, regardless of the parent element or screen size. Pixels are fixed and do not scale, making them useful for precise layouts but less flexible for responsive design.
REM (Root Em) is a relative unit of measurement in CSS. It is always relative to the root
element's font size (usually the <html> element). By default, the root font size is 16px,
so 1rem = 16px. REM units are scalable and responsive, making them ideal for modern web development.
Why Use REM Instead of PX?
- Responsive Design: REM values scale based on the root font size, making it easier to create responsive layouts.
- Better Accessibility: Users who have set a custom base font size in their browser will see properly scaled text.
- Easier Maintenance: Changing the root font size updates all REM-based values throughout your site.
- Better for Typography: Line heights, margins, and paddings scale together when using REM.
Common Conversions
| REM | PX (16px base) | Usage |
|---|---|---|
| 0.5rem | 8px | Small text, helper text |
| 0.75rem | 12px | Smaller text |
| 1rem | 16px | Base font size, body text |
| 1.25rem | 20px | Normal text |
| 1.5rem | 24px | Headings, larger text |
| 2rem | 32px | Large headings |
| 2.5rem | 40px | Very large headings |
| 3rem | 48px | Page titles |
Example CSS Code
/* Setting the root font size to 16px (default in most browsers) */
html {
font-size: 16px;
}
/* Using REM for responsive spacing */
body {
font-size: 1rem; /* 16px */
line-height: 1.5rem; /* 24px */
}
h1 {
font-size: 2rem; /* 32px */
margin-bottom: 1.5rem; /* 24px */
}
h2 {
font-size: 1.5rem; /* 24px */
margin-bottom: 1rem; /* 16px */
}
.button {
padding: 0.75rem 1.5rem; /* 12px 24px */
font-size: 1rem; /* 16px */
}
Send me your feedback about this REM to PX converter and let me know if you have some specific need, then I can implement this new feature and improve this online tool. Also, let me know if you have some need about other different CSS tool or coding tool set.
You can learn about how this online tool works or contribute improving the REM to PX Converter by programming some new feature or fixing bugs. For that, go to Github on Imediacto-Online-Tool-Set repository. Any contribution is welcome and very appreciated. Thank you!
