Guidance on font sizes
Base font sizes
| Font size (%) in body tag |
Resultant pixel size with 1 em |
| 62.50 |
10 |
| 68.75 |
11 |
| 75.00 |
12 |
| 81.30 |
13 |
| 87.50 |
14 |
| 93.75 |
15 |
| 100 |
16 |
The resultant values for when keeping em, pt and px the same size.
| EM |
PT |
PX |
| 0.5em aAwW |
6pt aAwW |
8px aAwW |
| 0.6em aAwW |
7pt aAwW |
9px aAwW |
| 0.65em aAwW |
7.5pt aAwW |
10px aAwW |
| 0.7em aAwW |
8pt aAwW |
11px aAwW |
| 0.8em aAwW |
10pt aAwW |
12px aAwW |
| 0.8em aAwW |
10pt aAwW |
13px aAwW |
| 0.9em aAwW |
10.5pt aAwW |
14px aAwW |
| 0.95em aAwW |
11pt aAwW |
15px aAwW |
| 1.0em aAwW |
12pt aAwW |
16px aAwW |
| 1.05em aAwW |
13pt aAwW |
17px aAwW |
| 1.1em aAwW |
13.5pt aAwW |
18px aAwW |
| 1.2em aAwW |
14.0pt aAwW |
19px aAwW |
| 1.25em aAwW |
15pt aAwW |
20px aAwW |
| 1.3em aAwW |
16pt aAwW |
21px aAwW |
| 1.35em aAwW |
17pt aAwW |
22px aAwW |
| 1.45em aAwW |
18pt aAwW |
23px aAwW |
| 1.55em aAwW |
19pt aAwW |
24px aAwW |
| 1.6em aAwW |
20pt aAwW |
26px aAwW |
| 1.7em aAwW |
21pt aAwW |
27px aAwW |
| 1.8em aAwW |
22pt aAwW |
28px aAwW |
| 1.9em aAwW |
23pt aAwW |
30px aAwW |
| 2.0em aAwW |
24pt aAwW |
31px aAwW |
| 2.05em aAwW |
25pt aAwW |
32px aAwW |
| 2.1em aAwW |
26pt aAwW |
33px aAwW |
The difference in size when em, pt and px are kept the same numerically
| EM |
PT |
PX |
| 0.8em aAwW |
8pt aAwW |
8px aAwW |
| 0.9em aAwW |
9pt aAwW |
9px aAwW |
| 1em aAwW |
10pt aAwW |
10px aAwW |
| 1.1em aAwW |
11pt aAwW |
11px aAwW |
| 1.2em aAwW |
12pt aAwW |
12px aAwW |
| 1.3em aAwW |
13pt aAwW |
13px aAwW |
| 1.4em aAwW |
14pt aAwW |
14px aAwW |
| 1.5em aAwW |
15pt aAwW |
15px aAwW |
| 1.6em aAwW |
16pt aAwW |
16px aAwW |
| 1.7em aAwW |
17pt aAwW |
17px aAwW |
| 1.8em aAwW |
18pt aAwW |
18px aAwW |
| 1.9em aAwW |
19pt aAwW |
19px aAwW |
| 2.0em aAwW |
20pt aAwW |
20px aAwW |
| 2.1em aAwW |
21pt aAwW |
21px aAwW |
| 2.2em aAwW |
22pt aAwW |
22px aAwW |
Comparison between font-size and the size attribute in the font tag
This is font-size: 7px
This is font-size: 7pt
This is font-size: 8px
This is font-size: 8pt
This is font-size: 9px
This is font-size: 9pt
This is FONT SIZE=1
This is font-size: 10px
This is font-size: 10pt
This is FONT SIZE=2
This is font-size: 11pt
This is font-size: 12pt
This is FONT SIZE=3
This is font-size: 13pt
This is font-size: 14pt
This is font-size: 15pt
This is FONT SIZE=4
This is font-size: 16pt
This is font-size: 17pt
This is font-size: 18pt
This is FONT SIZE=5
This is font-size: 19pt
This is font-size: 20pt
This is font-size: 21pt
This is font-size: 22pt
This is font-size: 23pt
This is font-size: 24pt
This is FONT SIZE=6
This is font-size: 25pt
This is font-size: 26pt