CSS单位转换
CSS单位在线换算，px、rem、em、vw、vh、pt等单位互转
px
px
px
px
px
16px
原始像素值
rem
1.0000rem
16 / 16
em
1.0000em
16 / 16 (相对于父元素)
vw
0.8333vw
(16 / 1920) * 100
vh
1.4815vh
(16 / 1080) * 100
pt
12.00pt
16 * 0.75 (1px = 0.75pt)
%
100.00%
(16 / 16) * 100 (相对于基准字体)
4px=0.25rem
8px=0.5rem
12px=0.75rem
14px=0.875rem
16px=1rem
18px=1.125rem
20px=1.25rem
24px=1.5rem
32px=2rem
48px=3rem
64px=4rem