|
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 REM to PX converter is a specialized utility that helps web developers and designers convert relative rem (root em) units into absolute pixel (px) values. This type of conversion is particularly useful when fine-tuning layouts, ensuring visual precision, or maintaining consistent sizing across various devices and browsers.
In Cascading Style Sheets (CSS), REM units scale relative to the root font size (usually defined on the <html> element). A REM to PX converter calculates the equivalent pixel value by multiplying the rem value by the root font size. For example, if 1rem = 16px, then 2rem equals 32px. This tool simplifies that calculation process, helping developers quickly determine pixel equivalents without manual math.
While REM units are ideal for scalability and accessibility, there are cases where pixel precision is necessary — such as when aligning graphical elements or defining static spacing in fixed layouts. A REM to PX converter bridges that gap, ensuring you can easily switch between flexible and fixed measurement systems depending on your design needs.
Convert Relative REM Values to Exact Pixel Sizes: Quickly translate rem-based measurements (e.g., 1.25rem) into their pixel equivalents based on the root font size. This is especially helpful for ensuring exact dimensions in icons, containers, or design systems that require precision.
Validate Responsive Designs: Check how elements defined in rems appear at different root font sizes, ensuring consistent scaling and alignment.
Optimize Accessibility Testing: Understand how changing the root font size affects pixel rendering, helping test accessibility scenarios for users who adjust browser zoom or font settings.
Maintain Visual Consistency: When collaborating across design and development teams, pixel conversion helps match mockup dimensions to rem-based implementation.
Cross-Platform Compatibility: Works seamlessly across all browsers and operating systems, including Chrome, Safari, Firefox, Edge, Windows, macOS, and Linux.
Identify the Root Font Size: In most browsers, the default root font size is 16px unless overridden in CSS.
Collect REM Values: Choose the rem-based sizes (e.g., font-size, margin, padding) you want to convert.
Input Values into the Converter: Enter both the rem value and the root font size into the converter.
Get the Pixel Output: The tool will instantly return the equivalent pixel value. For example, 1.5rem with a root font size of 16px equals 24px.
Apply or Reference the Value: Use the pixel results to align design specifications or verify responsive scaling accuracy.
Test Responsiveness: Ensure that scaling remains appropriate across multiple viewports and zoom levels.
PX (Pixels): A fixed, absolute measurement unit. Perfect for static elements, icons, and precise design requirements. 16px always equals 16 pixels on screen, regardless of the root font size.
REM (Root EM): A relative unit that adapts to the root font size. Ideal for responsive design and accessibility since elements scale proportionally.
For example:
With a root font size of 16px, 1rem = 16px and 2rem = 32px.
If the root size increases to 20px, 1rem = 20px, and 2rem = 40px.
Conclusion: Use REM for flexibility and accessibility; use PX for pixel-perfect precision. Both have their place: REM for dynamic design systems and PX for exact layout control.
Simplifies Conversion: Instantly calculates pixel equivalents for rem values without manual math.
Ensures Visual Accuracy: Helpful when matching design specs or debugging spacing issues.
Improves Design Consistency: Keeps pixel-based mockups aligned with rem-based CSS code.
Saves Development Time: Automates repetitive conversions during design implementation.
Enhances Accessibility Testing: Makes it easier to simulate font scaling behavior.
Responsive Typography Validation: Ensures that rem-defined fonts and spacing behave predictably at different base font sizes.
Cross-Browser Consistency: Provides predictable pixel results across all browsers and display types.
Which is better, REM or PX?
Use REM for accessibility and responsive scaling. Use PX for exact sizing where flexibility is unnecessary.
How big is 1rem in PX?
By default, if the root font size is 16px, then 1rem = 16px. If the root font size changes, the equivalent pixel value adjusts automatically.
What is 2rem in PX?
With a base font size of 16px, 2rem = 32px. If the root font size is 20px, 2rem = 40px.
Is 16px equal to 1rem?
Yes, when the root font size is 16px. If you increase or decrease the root font size, 1rem will always scale relative to that value.