Approximate Conversion from Points to Pixels (and Ems and %)

Here's a chart that converts points to pixels (and ems and %). It's an approximation, which will depend on font, browser and OS, but it's a good starting point.

Points
Pixels
Ems
Percent
6pt
8px
0.5em
50%
7pt
9px
0.55em
55%
7.5pt
10px
0.625em
62.5%
8pt
11px
0.7em
70%
9pt
12px
0.75em
75%
10pt
13px
0.8em
80%
10.5pt
14px
0.875em
87.5%
11pt
15px
0.95em
95%
12pt
16px
1em
100%
13pt
17px
1.05em
105%
13.5pt
18px
1.125em
112.5%
14pt
19px
1.2em
120%
14.5pt
20px
1.25em
125%
15pt
21px
1.3em
130%
16pt
22px
1.4em
140%
17pt
23px
1.45em
145%
18pt
24px
1.5em
150%
20pt
26px
1.6em
160%
22pt
29px
1.8em
180%
24pt
32px
2em
200%
26pt
35px
2.2em
220%
27pt
36px
2.25em
225%
28pt
37px
2.3em
230%
29pt
38px
2.35em
235%
30pt
40px
2.45em
245%
32pt
42px
2.55em
255%
34pt
45px
2.75em
275%
36pt
48px
3em
300%