Two divs, one fixed width, the other, the rest

Question

I\'ve got two div containers.

Whilst one needs to be a specific width, I need to adjust it, so that, the other div takes up the rest of the space. Is there any way I

Answer 1

It's 2017 and the best way to do it is by using flexbox, which is IE10+ compatible.

.box {
  display: flex;
}

.left {
  flex: 1;  /* grow */
  border: 1px dashed #f0f;
}

.right {
  flex: 0 0 250px; /* do not grow, do not shrink, start at 250px */
  border: 1px dashed #00f;
}

  
Left
  
Right 250px