It really can vary, but you never want to have to walk too far in your kitchen to get from one work space to another.

At the same time, you don't want to be too crowded.

The distance between counters across from each other might be 5 feet.

The distance from the sink to the stove to the refrigerator should be in the 5 foot range also.......but every design varies.

The work triangle has morphed a bit - here is a great article:
http://bit.ly/1twBeIy