Css percentrage minus px

You can use calc:

height: calc(100% - 18px);
Note that some old browsers don't support the CSS3 calc() function, so implementing the vendor-specific versions of the function may be required:

/* Firefox */
height: -moz-calc(100% - 18px);
/* WebKit */
height: -webkit-calc(100% - 18px);
/* Opera */
height: -o-calc(100% - 18px);
/* Standard */
height: calc(100% - 18px);

Similar codes

1 vote110 views1 answer
SCSS Breakpoints
CSS
1 vote114 views1 answer
Ionchips scroll x
CSS
1 vote104 views1 answer
How to gain full width of a phone website in html and css
CSS
0 vote104 views1 answer
Many pseudo selectors in css
CSS
0 vote106 views1 answer
Css feather border
CSS
0 vote114 views2 answers
Remove unused css styles
CSS
1 vote114 views1 answer
Out transition does not ease
CSS
1 vote110 views1 answer
Show hide item based on display size
CSS
21 votes108 views2 answers
Remove focus border
CSS
25 votes138 views3 answers
Invisible item frames in minecraft
CSS