What is the default font size of the heading element?

Question

<h1> <h2> <h3> <h4> <h5> <h6>

Answer 1

h1 36px
h2 24px
h3 21px
h4 18px
h5 16px
h6 14px
These values may vary browser to browser

Answer 2

For the default font size see the link below:
https://www.w3schools.com/tags/tag_hn.asp. And for size conversions see:
http://pxtoem.com.