Fence Calculator
Estimate the number of posts, panels, and total cost for your fencing project.
About the Fence Calculator
Installing a fence is a major home improvement project — materials alone can run $1,500–$4,000 for a typical suburban yard. Accurate material estimation prevents mid-project shortages and helps you compare contractor quotes intelligently.
Key Terms
Linear feet: The total perimeter length of your fence run. Post spacing: Distance between fence posts (typically 6–8 feet). Posts must withstand wind load, so wider spacing requires larger posts. Panels: Pre-assembled fence sections fitting between posts. Common widths: 6 ft or 8 ft. Rails: Horizontal boards that connect posts; most fences use 2–3 rails per panel height.
Post Count Formula
Number of posts = (Total length ÷ Post spacing) + 1. For a 120-foot fence with 8-foot spacing: (120 ÷ 8) + 1 = 16 posts. Corner and gate posts count separately and may need to be doubled (double-post corners add stability).
Material Quantities
Wood fence pickets: For a 6-ft privacy fence, you need approximately 2 pickets per linear foot (pickets are typically 5.5 inches wide with a ½-inch gap). Concrete for posts: One 50 lb bag per post for standard 4×4 posts in typical soil. Post depth: Bury posts at least 24 inches deep, or 1/3 of the total post length — whichever is greater.
Fence Material Comparison
Wood (cedar/pine): $10–30/LF installed; lasts 15–30 years with maintenance. Vinyl: $20–40/LF installed; lasts 30+ years, no painting. Aluminum: $25–40/LF installed; great for decorative and pool fences. Chain link: $8–18/LF installed; most affordable, low maintenance.
Permits and HOA
Many municipalities require a building permit for fences over 6 feet tall, and HOAs often restrict fence materials, colors, and heights. Always check local rules before purchasing materials.