While bootstrap uses ems or rems for defining most sizes pxs are used for grid breakpoints and container widths.
Bootstrap gutter width 1170.
This is because the viewport width is in pixels and does not change with the font size.
See how aspects of the bootstrap grid system work across multiple devices with a handy table.
Variables determine the number of columns the gutter width and the media query point at which to begin floating columns.
Rows are wrappers for columns.
Sachin verma jul 25 16 at 12 32.
In addition to prebuilt grid classes for fast layouts bootstrap includes less variables and mixins for quickly generating your own simple semantic layouts.
Attached it says all gutters get width of 30px 15 on each side.
That makes design area 1140 940 and 720 according this.
With the responsive css file added the grid adapts to be 724px and 1170px wide depending on your viewport.
Use the class container for fixed width or container fluid for variable width.
I see most sites designed in a container of 1200 with design canvas at 1170.
The default bootstrap grid system utilizes 12 columns making for a 940px wide container without responsive features enabled.
100 across all viewport and device sizes.
I meant the container width 1170 container in bootstrap and my question is that is it necessary to limit the container to 1170 for a bootstrap grid to make a responsive design or can we have say a 16 column grid in 1440 container including gutter margin i hope it makes my question clear.