|
EM |
Pixel | REM | Percent | Point |
|---|---|---|---|---|
| 0.0625em | 1px | 0.0625rem | 6.25% | 0.75pt |
| 0.125em | 2px | 0.125rem | 12.5% | 1.5pt |
| 0.1875em | 3px | 0.1875rem | 18.75% | 2.25pt |
| 0.25em | 4px | 0.25rem | 25% | 3pt |
| 0.3125em | 5px | 0.3125rem | 31.25% | 3.75pt |
| 0.375em | 6px | 0.375rem | 37.5% | 4.5pt |
| 0.4375em | 7px | 0.4375rem | 43.75% | 5.25pt |
| 0.5em | 8px | 0.5rem | 50% | 6pt |
| 0.5625em | 9px | 0.5625rem | 56.25% | 6.75pt |
| 0.625em | 10px | 0.625rem | 62.5% | 7.5pt |
| 0.6875em | 11px | 0.6875rem | 68.75% | 8.25pt |
| 0.75em | 12px | 0.75rem | 75% | 9pt |
| 0.8125em | 13px | 0.8125rem | 81.25% | 9.75pt |
| 0.875em | 14px | 0.875rem | 87.5% | 10.50pt |
| 0.9375em | 15px | 0.9375rem | 93.75% | 11.25pt |
| 1em | 16px | 1rem | 100% | 12pt |
| 1.0625em | 17px | 1.0625rem | 106.25% | 12.75pt |
| 1.125em | 18px | 1.125rem | 112.5% | 13.5pt |
| 1.1875em | 19px | 1.1875rem | 118.75% | 14.25pt |
| 1.25em | 20px | 1.25rem | 125% | 15pt |
| 1.3125em | 21px | 1.3125rem | 131.25% | 15.75pt |
| 1.375em | 22px | 1.375rem | 137.5% | 16.50pt |
| 1.4375em | 23px | 1.4375rem | 143.75% | 17.25pt |
| 1.5em | 24px | 1.5rem | 150% | 18pt |
| 1.5625em | 25px | 1.5625rem | 156.25% | 18.75pt |
| 1.625em | 26px | 1.625rem | 162.5% | 19.5pt |
| 1.6875em | 27px | 1.6875rem | 168.75% | 20.25pt |
| 1.75em | 28px | 1.75rem | 175% | 21pt |
| 1.8125em | 29px | 1.8125rem | 181.25% | 21.75pt |
| 1.875em | 30px | 1.875rem | 187.5% | 22.5pt |
| 1.9375em | 31px | 1.9375rem | 193.75% | 23.25pt |
| 2em | 32px | 2rem | 200% | 24pt |
| 2.0625em | 33px | 2.0625rem | 206.25% | 24.75pt |
| 2.125em | 34px | 2.125rem | 212.5% | 25.5pt |
| 2.1875em | 35px | 2.1875rem | 218.75% | 26.25pt |
| 2.25em | 36px | 2.25rem | 225% | 27pt |
| 2.3125em | 37px | 2.3125rem | 231.25% | 27.75pt |
| 2.375em | 38px | 2.375rem | 237.5% | 28.5pt |
| 2.4375em | 39px | 2.4375rem | 243.75% | 29.25pt |
| 2.5em | 40px | 2.5rem | 250% | 30pt |
| 2.5625em | 41px | 2.5625rem | 256.25% | 30.75pt |
| 2.625em | 42px | 2.625rem | 262.5% | 31.5pt |
| 2.6875em | 43px | 2.6875rem | 268.75% | 32.25pt |
| 2.75em | 44px | 2.75rem | 275% | 33pt |
| 2.8125em | 45px | 2.8125rem | 281.25% | 33.75pt |
| 2.875em | 46px | 2.875rem | 287.5% | 34.5pt |
| 2.9375em | 47px | 2.9375rem | 293.75% | 35.25pt |
| 3em | 48px | 3rem | 300% | 36pt |
| 3.0625em | 49px | 3.0625rem | 306.25% | 36.75pt |
| 3.125em | 50px | 3.125rem | 312.5% | 37.5pt |
A PX to REM converter is a specialized tool used by web developers and designers to convert pixel (px) values into root em (rem) units.
These conversions play a crucial role in creating responsive, scalable, and accessible web designs. Instead of relying on fixed units like pixels, REM units scale proportionally based on the root font size (typically defined on the <html> element).
This means that when a user adjusts their default font settings or accesses a site on a different device, elements defined with REM units will scale accordingly.
PX values are absolute, while REM values are relative. This relativity gives designers more flexibility and control over how layouts and typography adapt across screen sizes and user settings. By using a PX to REM converter, you can ensure your website maintains visual consistency and accessibility, no matter the viewing context.
Convert Fixed Pixels to Scalable REM Units: Seamlessly convert pixel values (e.g.,20px) into equivalent REM values based on a given root font size (e.g., 1.25rem if root is 16px).
Improve Typography Scalability: Use REM units for fonts, margins, paddings, and spacing to ensure consistent scaling across devices.
Support Accessibility Best Practices: Allow users with custom font size preferences to experience your site comfortably, as REM units scale with their browser settings.
Create Design Consistency: In large projects, REM ensures all sizes scale together. Changing the root font size instantly affects all REM-based elements, making global updates easy.
Ensure Cross-Platform Compatibility: Online PX to REM converters work across operating systems (Windows, macOS, Linux) and browsers (Chrome, Firefox, Safari, Edge), offering maximum accessibility.
Identify Your Root Font Size: Usually this is 16px unless overridden in your CSS.
Gather the PX Values: Choose the fixed pixel values you'd like to convert (font-size, padding, margin, etc.).
Input Values Into Converter: Use an online tool or calculator. Enter your pixel value and root font size.
Retrieve the REM Output: The tool will display the exact REM value (e.g., 24px = 1.5rem with a 16px root).
Update Your CSS: Replace px units in your stylesheet with the corresponding rem values.
Test Across Browsers: Confirm that elements scale correctly across different environments.
PX (Pixels): A fixed, absolute unit. 16px always means 16 device pixels. It does not scale with user settings.
REM (Root EM): A relative unit that scales based on the root font size. 1rem = root size. It adapts to user preferences and device defaults.
For example:
If the root font size is 16px, then 1rem = 16px and 2rem = 32px
If the user increases their base font size to 20px, the same 2rem now becomes 40px.
Conclusion: REM supports responsive design and user accessibility; PX supports precision. Use REM for typography and layout; use PX for fine-tuned UI elements like icons.
Simplifies Conversion: No need to manually divide every pixel value; just enter and get the result.
Ensures Design Scalability: Helps adapt designs to screen sizes, resolutions, and accessibility preferences.
Boosts Consistency: Changes made to the root font size will ripple through all REM-defined elements.
Saves Development Time: Avoid rewriting values in case of typography or layout revisions.
Enhances UX and Readability: Ensures users can read content comfortably on any device.
Responsive Typography: Makes it easier to implement scalable headings, paragraphs, and component spacing.
Cross-Browser Friendly: REM values behave consistently across all modern browsers.
Which is better, PX or REM?
Use REM when accessibility and responsiveness matter. Use PX for fixed elements needing precision.
How big is 1rem in PX?
It depends on the root font size. By default, 1rem = 16px.
What is 20px in rem?
Assuming a root font size of 16px, 20px = 1.25rem (20 / 16 = 1.25).
Is 16px equal to 1rem?
Yes, if the root font size is 16px. However, if the root font size is changed, 1rem will equal the new root value.