px ke Rem
rootSize = 16 (default)
Formula: pixelSize / rootSize
PX ↔︎ REM conversion tables
Pixels REM
1px 0.06rem
2px 0.13rem
3px 0.19rem
4px 0.3rem
5px 0.3rem
6px 0.4rem
8px 0.5rem
10px 0.6rem
12px 0.8rem
14px 0.9rem
15px 0.9rem
16px 1rem
18px 1.1rem
20px 1.3rem
24px 1.5rem
25px 1.6rem
28px 1.8rem
32px 2rem
36px 2rem
40px 3rem
44px 3rem
48px 3rem
50px 3rem
56px 4rem
64px 4rem
72px 5rem
75px 5rem
80px 5rem
90px 6rem
100px 6rem
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