CSS text size conversion table

By point, pixel, em/rem and percent.

Notes:

• Assuming the :root font-size is 16px (default of browsers).
• The calculated size of em and % depends on parent/ancestors.
• Actual rendered size may depend on font, browser, and operating system.
• 1 px = 0.75 point; 1 point = 1.333333 px
• This data is useful for when assessing compliance with WCAG SC 1.4.3 Contrast (Minimum) (Level AA) which, for its purposes, "large text" is "at least 18 point or 14 point bold".

CSS text size conversion table

Points	Pixels	Ems/Rems	Percent	Keyword
6pt	8px	0.5em	50%
7pt	9px	0.5625em	56%
7.5pt	10px	0.625em	62.5%	x-small
8pt	11px	0.6875em	69%
9pt	12px	0.75em	75%
10pt	13px	0.8125em	81%	small
10.5pt	14px	0.875em	87.5%
11pt	15px	0.9375em	94%
12pt	16px	1em	100%	medium
13pt	17px	1.0625em	106%
13.5pt	18px	1.125em	112.5%	large
14pt	19px	1.1875em	119%
15pt	20px	1.25em	125%
16pt	21px	1.3125em	131%
16.5pt	22px	1.375em	138%
17pt	23px	1.4375em	144%
18pt	24px	1.5em	150%	x-large
19pt	25px	1.5625em	156%
19.5pt	26px	1.625em	162.5%
20pt	27px	1.6875em	169%
21pt	28px	1.75em	175%
22pt	29px	1.8125em	181%
22.5pt	30px	1.875em	187.5%
24pt	32px	2em	200%	xx-large
26pt	35px	2.1875em	219%
27pt	36px	2.25em	225%
28pt	37px	2.3125em	231%
29pt	39px	2.4375em	244%
30pt	40px	2.5em	25%
31.5pt	42px	2.625em	263%
33pt	44px	2.75em	275%
34pt	45px	2.8125em	281%
36pt	48px	3em	300%