Fence Calculator

This fence calculator helps you estimate the materials needed to build a wood privacy fence, wood picket fence, or chain link fence. Enter your total fence length, height, post spacing, and number of gates to get a complete materials list including posts, rails, pickets or mesh, concrete, and hardware.

Post depth and sizing: A general rule of thumb is to bury one-third of the total post length underground. For a 6-foot fence, use 9-foot posts with 3 feet buried. Posts should be set in concrete for stability - plan on two 60-pound bags of concrete per post. Dig post holes approximately 10 inches in diameter and deep enough so the post sits on 4-6 inches of gravel for drainage before the concrete is poured.

Concrete setting: Fast-setting concrete can be poured dry into the hole and then soaked with water, or mixed in a wheelbarrow and poured around the post. Allow at least 24-48 hours for the concrete to cure before attaching rails and pickets. In cold weather, curing may take longer. Crown the concrete slightly above ground level so water runs away from the post base.

Wood fence types: Privacy fences use 5.5-inch wide pickets placed edge to edge with no gaps, providing complete visual screening. Picket fences use 3.5-inch wide pickets spaced approximately 1.75 inches apart for a classic look. Fences under 6 feet tall typically need two horizontal rails, while fences 6 feet and taller require three rails for adequate support and to prevent warping.

Chain link fences: Chain link uses terminal (end/corner/gate) posts and line posts. Top rail is sold in 10.5-foot sections that sleeve together. Tension bars and bands are needed at each terminal post to stretch the mesh fabric taut. Chain link is generally the most economical fencing option and requires less maintenance than wood, though it offers less privacy unless slats or screening are added.