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PX to REM Convertor
PX
REM
Converter
16
PX
1
rem
How it works
Converting between REM and pixels (PX) is a common task in web development. With our REM to PX converter, you can effortlessly switch between these units. Whether you're looking to convert PX to REM or REM to pixels, our tool has got you covered.
Most browsers use a default font-size value of 16px. This means 1rem is equivalent to 16px by default. But, if you decided to change the default root font-size value, you can easily input your changed root font-size to accurately convert from rem to px using this instantaneously bidirectional converter.
How do you convert REMs to pixels
To convert ‘rem’ to ‘px’, multiply the ‘rem’ value by the base font size (usually 16px in most browsers).
Formula: px = rem × base font size
E.g., 2rem is 32px if the base font size is 16px.
How do you convert pixels to REMs?
To convert ‘px’ to ‘rem’, divide the ‘px’ value by the base font size (typically 16px in most browsers).
Formula: rem = px ÷ base font size
E.g., 32px is 2rem if the base font size is 16px.
How to change base font size
To change the base font size, you typically modify the font-size property for the <html> or <body> element in your CSS.
Here's how:
html {
font-size: 18px; /* Change this value to your desired base font size */
}
Benefits of using REMs instead of PX
Scalability: REMs are relative to the root font size, typically set in the <html> element. This makes it easy to scale your entire website's font and layout by changing just one value, making it more adaptable to different screen sizes and resolutions.
Accessibility: REMs are more accessible because users can adjust their browser's font size settings, and the entire layout will respond accordingly. This ensures your content remains readable and usable for individuals with different accessibility needs.
Responsive Design: REMs are a crucial part of responsive web design. When combined with media queries, REMs allow for fluid and responsive layouts that adapt to various device sizes seamlessly.
Consistency: REMs promote consistency in your design. By using relative units, you can ensure that spacing, typography, and other design elements maintain their proportions across your website, creating a more harmonious user experience.
Accessibility Compliance: Many accessibility guidelines recommend using relative units like REMs for font sizing to ensure compliance with accessibility standards such as WCAG (Web Content Accessibility Guidelines).
Ease of Maintenance: When using REMs, you can manage your typography and layout more efficiently. Changing the root font size or base spacing unit can have a cascading effect across your entire design, simplifying maintenance and updates.
Browser Zoom Compatibility: REMs work well with browser zooming because they are based on the user's preferred font size. This means your design will remain legible and functional when users zoom in or out of the page.
Better User Experience: Using REMs contributes to a better user experience by ensuring that content scales appropriately and remains readable, even on high-resolution displays or when users have specific font size preferences.
Improved SEO: Some argue that using REMs can improve SEO, as search engines may consider a well-structured, accessible website more favorably in rankings.
How to use fluid design with REMs
Fluid design, also known as responsive design, is a web design approach that ensures your website looks and functions well on various screen sizes and devices. Using REM units and media queries is a key part of creating a fluid design. REM units (root em units) are relative units of measurement that are based on the font size of the root element (usually the <html> element). Media queries allow you to apply different CSS rules based on the screen size and other device characteristics. Here's how to use REMs and media queries for fluid design:
Set the Root Font Size:
Start by setting the root font size using REM units in your CSS. This size will serve as the base for all other REM units on your site. A common practice is to set the root font size to 16 pixels (1rem = 16px) since it's the default font size in most browsers. You can adjust this value based on your design preferences.
html {
font-size: 16px;
}
Use REM Units for Element Sizes:
Now, use REM units for specifying sizes of various elements, such as margins, padding, font sizes, and widths. This ensures that these elements scale proportionally with the root font size.
body {
font-size: 1rem;
padding: 0rem 1.5rem;
}
h1 {
font-size: 3.5rem; /* 56px */
line-height: 1.2em;
}
Implement Media Queries:
Media queries allow you to apply different styles based on the screen size or device characteristics. Use them to create breakpoints where your design adapts to different screen sizes. Here's an example:
/* Smaller screens ( phones ) */
@media screen and (max-width: 767px) {
body {
font-size: 0.875rem; /* 14px */
}
h1 {
font-size: 2rem; /* 32px */
}
}
Or instead of using PX, you can even use VW values so it becomes fully responsive based on device screen width:
/* Smaller screens ( phones ) */
@media screen and (max-width: 767px) {
body {
font-size: 2vw;
}
h1 {
font-size: 6.5vw;
}
}
Test and Iterate:
Testing your design on various devices and screen sizes is crucial to ensure it looks and works as intended. Use browser developer tools and online testing tools to check how your website responds to different screen sizes and adjust your media queries and REM units as needed.
By following these steps, you can create a fluid design using REM units and media queries that adapts to different devices and screen sizes, providing a better user experience for your website visitors.