Fence Calculator
Pickets, posts, rails, and concrete for a wood fence.
5.5" is a standard dog-ear picket
Pickets, posts, rails, and concrete for a wood fence.
5.5" is a standard dog-ear picket
Posts, rails, pickets, and the concrete to set it all in — worked out from the length of fence you are actually building.
Posts are spaced along the run at a fixed interval (8 feet is the usual maximum), and you always need one more post than the number of sections. Rails are then two or three per section, and the picket count is the fence length divided by the picket width plus any gap between them. Each post hole needs concrete, which is calculated from the hole's diameter and depth, minus the volume the post itself takes up.
Example
A 100-foot fence at 8-foot post spacing needs 13 sections and 14 posts. With 5 1/2-inch pickets butted together, that is around 220 pickets.
6 to 8 feet, with 8 feet being the common maximum for a standard wood fence. Closer spacing makes a noticeably stiffer fence and is worth it in windy spots.
About one third of the post's total length, and below your local frost line. For a typical 6-foot fence that means digging roughly 2 feet.
Usually one to two 50-pound bags per hole for a standard 4×4 in a 10-inch hole, depending on depth. The calculator works it out from your actual hole size.