PX ↔ REM Converter
PX → REM
REM → PX
Reference Table
| px | rem | em |
|---|
What is the difference between PX and REM?
PX (pixels) is an absolute unit — it always renders the same physical size. REM (root em) is a relative unit based on the root element's font size (usually 16px by default in browsers). Using REM makes it easier to build accessible, scalable layouts that respect user font-size preferences.
How to Use the PX to REM Converter
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Set the base font size (default is 16px — matches most browsers).
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Enter a pixel value to see the equivalent REM value.
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Or enter a REM value to convert it back to pixels.
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Use the reference table below for common size conversions.
Formula: rem = px ÷ base font size. For the default base of 16px: 1rem = 16px, 0.5rem = 8px, 1.5rem = 24px. All calculations happen instantly in your browser.
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