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About This Calculator
Building a fence requires careful planning to determine the correct quantities of posts, rails, pickets, and concrete. Spacing posts too far apart compromises structural integrity, while ordering too many materials wastes money. This calculator takes your perimeter length, fence height, and style to produce a complete materials list with accurate cost estimates.
Quick Tips
- 1 Fence posts should be spaced 6-8 feet apart with posts set 2 feet deep.
- 2 Add 10% extra materials for gate posts, corners, and cutting waste.
- 3 A 6-foot privacy fence typically needs three horizontal rails per section.
Example Calculation
Rectangular yard 80ft x 50ft, 6-foot privacy fence on 3 sides.
Fence length: 180 ft | Posts (8ft apart): 24 | Panels: 23 | Pickets: ~617
How to Estimate Fence Materials
Start with the total fence length and subtract gate openings. Divide the remaining length by post spacing and add one to get the number of posts. Each section between posts needs 2-3 horizontal rails. Picket count depends on picket width and spacing. Add gate posts (2 per gate) to the total post count.
Fence Post Depth and Sizing
Fence posts should be buried one-third their total length or at minimum 2 feet deep. For a 6-foot fence, use 8-foot posts buried 2 feet deep. Post holes are typically 6-10 inches in diameter. Set posts in concrete for maximum stability, especially for gate posts and corner posts.
Frequently Asked Questions
Standard post spacing is 6-8 feet for most residential fences. Closer spacing (6 feet) provides more strength for privacy fences. Wider spacing (8 feet) is common for ranch-style or picket fences. Never exceed 10 feet between posts.
Most fences use 2 horizontal rails for fences under 5 feet and 3 rails for taller fences. The top rail is placed 6-8 inches from the top, and the bottom rail 6-8 inches from the ground. A middle rail adds structural support.
Divide the total fence length (in inches) by the picket width plus gap. Standard pickets are 3.5 inches wide with a 0-1 inch gap. For a privacy fence with no gap, divide total length by picket width.