Convert REM to PX
Convert rem to pixels instantly. See exact pixel values for any rem with configurable base font size. Free CSS unit calculator.
Formula: px = rem × root font size (default 16px)
Quick example: 1.5rem × 16 = 24px
Value
Unit
px
px
px
px
pxSource
16pxrem
1remem
1emvh
1.4815vhvw
0.8333vwVisual Preview
16px
About This Conversion
Converting rem to pixels helps developers understand the actual rendered size of rem-based values. This is useful when inspecting layouts, matching design specs given in pixels, or debugging responsive sizing issues. The formula is straightforward: multiply the rem value by the root font size. With the browser default of 16px, 1rem equals 16px, 2rem equals 32px, and 0.5rem equals 8px. If your project uses a custom root font size (e.g., 10px with the 62.5% trick), adjust the base accordingly for accurate results.
Frequently Asked Questions
How do I convert REM to PX?
Multiply the rem value by the root font size (default 16px). For example: 2.5rem × 16 = 40px.
What is 1rem in pixels?
With the default browser settings, 1rem = 16px. This can change if the root font size is overridden in CSS.
Why would I need to convert back to pixels?
Design specs from tools like Figma often use pixels. Converting helps you verify that your rem values produce the intended pixel sizes.