What are the default font sizes (in pixels) for the html heading tags (

Question

What are the default font pixel sizes for the heading (h1-h6) tags?

Answer 1

I think it is as follows:

h1 is 2 em
h2 is 1.5 em
h3 is 1.3 em
h4 is 1 em
h5 is 0.8 em
h6 is 0.7 em

An em is not the same as a pixel. It is a relative way of looking at sizes. With that said I think most browsers default to 16px (or 1em).