Columns Percentage, no subpixels

1 column

1

2 columns

1
2

4 columns

1
2
3
4
1
2 - 4
1 - 2
3 - 4
1 - 3
4
1
2 - 3
4
1
2
3 - 4
1 - 2
3
4

5 columns

1
2
3
4
5
1
2 - 5
1 - 2
3 - 5
1 - 3
4 - 5
1 - 4
5
1
2 - 4
5
1
2 - 3
4 - 5

Responsive CSS Grid. Developed by cssgrid.co.