px
dpi
rem
0
mm
Calculation Method: rem × rootFontSize ÷ 3.78 = mm
REM to Millimeter Conversion Instructions
REM is a unit relative to the root element font size. By entering the REM value and the root element font size, you can calculate the corresponding millimeter value.
Common Conversion Values (Based on 16px Root Font):
- 1rem = 25.4mm
- 2rem = 50.8mm
- 6rem = 152.4mm
Usage Instructions:
- Set the root element font size (default 16px)
- Adjust the screen DPI value (default 96)
- Enter the REM value
- Get the corresponding millimeter value
Usage Tips:
- Suitable for precise size design and printing
- Calculate based on root font size
- Accurate to three decimal places