How this calculator works
The calculator divides total fence length by the selected post spacing to estimate the number of sections. Posts are counted as section count plus one end post, with two additional support posts for each gate. Rails are estimated by multiplying sections by rails per section, and pickets are estimated from linear feet times pickets per foot.
Example: a 120 ft fence with 8 ft spacing creates 15 sections. With 2 rails per section, the rail estimate is 30 rails. If the layout uses about 2 pickets per foot, the picket estimate is 240 pickets before waste.