What is Bootstrap's default font size?

Bootstrap’s font sizes are calculated off of the body font size by using rem values. If you change the body font size all styles will be increased/decreased automatically. Rem stands for “root em” because it calculates the size based on the size of the root of the document or body tag. So Bootstrap’s global default font-size is 16px.

What type of font does Bootstrap 4 use?

Bootstrap 4 uses a default font-size of 16px, and its line-height is 1.5. The default font-family is "Helvetica Neue", Helvetica, Arial, sans-serif. In addition, all elements have margin-top: 0 and margin-bottom: 1rem (16px by default). Bootstrap 4 styles HTML headings ( to ) with a bolder font-weight and an increased font-size:

What font size should I use?

When more control is needed, check out the textual utility classes. Use a native font stack that selects the best font-family for each OS and device. For a more inclusive and accessible type scale, we assume the browser default root font-size (typically 16px) so visitors can customize their browser defaults as needed.

What is the default size of H5 bootstrap heading?

The default font-size for Bootstrap is 1rem. This converted to the pixel equivalent is dependent on the default font-size of the browser. The majority of browsers today use 16px, but this can vary for older browsers.