CALTRX

Fence CalculatorEstimate fencing materials including posts, rails, and pickets. Enter total fence length and spacing for accurate material lists.

Estimate fencing materials including posts, rails, and pickets. Enter total fence length and spacing for accurate material lists.

ft
ft
in
in
Posts = (Length / Spacing) + 1 | Rails = Sections × Rails/Section | Pickets = Length × 12 / (picketWidth + gap)
Length= Total fence length
Spacing= Distance between posts
Sections= Number of fence sections

Tips & Notes

  • ✓Standard post spacing is 6-8 feet for most fence styles.
  • ✓Add extra posts for corners and gates.
  • ✓Set posts in concrete to at least 1/3 of total post length for stability.

Common Mistakes

  • ✗Forgetting to add 1 to the number of sections to get the total number of posts.
  • ✗Not accounting for gate posts, corner posts, and end posts.
  • ✗Using nominal lumber dimensions instead of actual dimensions for picket width.

Fence Calculator Overview

Fence Calculator Overview

The Fence Calculator provides a complete material estimate for fencing projects by computing the number of posts, rails, and pickets needed based on your specifications. Accurate material estimation prevents both shortages that delay work and excess that wastes money.

Post spacing is the primary design decision that affects both cost and structural integrity. Standard 8-foot spacing works for most residential applications, while 6-foot spacing provides additional strength for tall fences, privacy fences, and areas subject to high winds.

The calculator accounts for the relationship between picket width and gap spacing to determine the total number of pickets. Standard dimensional lumber pickets are typically 3.5 inches wide (nominal 4-inch). The gap between pickets varies by style: privacy fences use no gap, while standard picket fences use 1/4 to 3/4 inch gaps.

Frequently Asked Questions

The general rule is to bury 1/3 of the total post length. For a 6-foot above-ground fence, use 9-foot posts with 3 feet buried. In areas with frost, posts should extend below the frost line.

Most residential fences use 6 to 8 feet between posts. Closer spacing (6 feet) provides more strength, while 8-foot spacing is more economical. Never exceed the length of your rail material.

Two rails (top and bottom) are standard for fences up to 5 feet. Fences 6 feet and taller typically need three rails for adequate support and to prevent sagging.

Yes, add 5-10% extra for pickets and rails to account for defects, cuts, and natural variations. Buy 1-2 extra posts for replacements.