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

28 votes233 views6 answers
Margin
CSS
1 vote213 views1 answer
Css random
CSS
0 vote212 views1 answer
Offsetx and offsety in css
CSS
0 vote201 views1 answer
WoWonder
CSS
0 vote208 views1 answer
Enqueing another css file in shild
CSS
11 votes199 views2 answers
How to center horizontally and vertically block div
CSS
0 vote210 views2 answers
Fixed footer in Bootstrap
CSS
1 vote202 views1 answer
SCSS Breakpoints
CSS
0 vote203 views1 answer
Css - use universal '*' selector vs. html or body selector?
CSS
-1 vote202 views1 answer
Centralize div css
CSS