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

3 votes284 views4 answers
Css keep image ratio
CSS
0 vote300 views1 answer
Jquery woocommerce disable add to cart css
CSS
0 vote279 views1 answer
Trim background image css
CSS
0 vote276 views1 answer
Responsive image slider html css
CSS
0 vote271 views1 answer
CSS style all div elements
CSS
0 vote277 views1 answer
Chrome remove black inline from click button
CSS
3 votes283 views3 answers
How to change paragraph text color to orange - css
CSS
0 vote285 views1 answer
Simple font-face mixin scss
CSS
1 vote275 views1 answer
Css use :root
CSS
1 vote254 views1 answer
-webkit css
CSS