Fence Calculator

Calculate posts, rails, pickets, concrete bags, and complete material & labor installation costs for wood, vinyl, and chain-link fence projects.

Fence Dimensions & Style

US Customary (ft / in)
Quick Project Presets
ft
ft
ft
5.5 in is standard dog-ear
in
1/8 in for expansion
in
National average is $12–$18 / linear foot
$/ft
Estimated Total Project Cost
$4,577($30.51 / lin ft)
21 Posts · 42 Concrete Bags

4×4 Posts

21 Posts

2×4 Rails

57 Rails (3/bay)

Pickets Needed

360 Pickets

Concrete Bags

42 Bags (50 lb)

Cost Allocation Breakdown (Pressure-Treated Wood)

Lumber / Materials$2,317Posts, rails, pickets, cement
Installation Labor$2,100@ $14 / lin ft
Gates & Hardware$1601 Gate(s) included

Pro Fence Setting Technique

Always dig post holes at least 1/3 of the total post length (24–36 inches deep) and add 3–4 inches of crushed drainage gravel at the bottom of each hole before pouring concrete to prevent standing water from rotting post ends.

How to Calculate Fence Materials Accurately

Building a sturdy fence requires balancing structural framing components (posts, horizontal rails, and concrete footings) with surface infill (pickets or vinyl panels). Factoring in gate openings and terminal end posts prevents shortfalls at the lumber yard.

1. Fence Posts & Sections Formula
Posts Count=
Total Length (ft) − (Gates × Gate Width)Post Spacing (e.g. 8 ft)
+ 1 (End Post) + Number of Gates
2. Wood Pickets Quantity Formula
Pickets Count=
Net Fence Run Length (inches)Picket Width (in) + Spacing Gap (in)
× 1.05 (5% Cutting Waste)
Step-by-Step Calculation Breakdown
Step 1: Calculate Net Fence Run (150 ft Run with One 4-ft Walk Gate)
Net Infill Run = 150 ft − 4 ft gate = 146 linear feet
Sections at 8-ft on center = 146 ft ÷ 8 ft = 19 sections
Step 2: Calculate Posts, 2×4 Rails, and Concrete Bags (6-ft Height)
Posts = 19 sections + 1 end post + 1 gate post = 21 Posts (4×4×8ft PT)
Concrete = 21 posts × 2 bags = 42 Bags (50 lb quick-set)
Rails (3 per 6ft section) = 19 sections × 3 rails = 57 Rails (2×4×8ft PT)
Step 3: Calculate 5.5-inch Dog-Ear Pickets with 5% Waste
Pickets=[(146 × 12 in) ÷ (5.5 + 0.125 in)] × 1.05=328 Pickets (Order 330)

Fence Material Comparison: Cost & Durability

Fence Style & MaterialCost per Lin Ft (Installed)LifespanMaintenance Needs
Pressure-Treated Pine (6ft Privacy)$18 – $28 / ft12 – 15 YearsStain or water-seal every 2–3 years
Western Red Cedar (6ft Privacy)$26 – $38 / ft20 – 25 YearsNaturally rot & insect resistant, occasional sealing
Vinyl / PVC Privacy Panels$32 – $55 / ft25 – 30+ YearsZero painting; hose down with mild detergent
Galvanized Chain Link (4ft – 6ft)$14 – $24 / ft20 – 25 YearsVirtually zero maintenance

Frequently Asked Questions

How much does it cost to build a fence in 2026?
A typical 150-foot residential privacy fence costs $2,800 to $5,200 installed. Wood privacy fences range from $18–$32 per linear foot installed ($8–$14 materials + $10–$18 labor). Vinyl privacy fences range from $30–$55 per linear foot. Chain-link fences are the most economical option at $14–$25 per linear foot.
How far apart should fence posts be installed?
Standard fence post spacing is 8 feet on center for wood and chain link fences, and 6 or 8 feet for vinyl panel systems. In high-wind zones or for 8-foot tall privacy fences, 6-foot spacing provides superior structural resistance against wind gusts. Posts must be set below the local winter frost line (typically 24 to 36 inches deep) and anchored with 2 bags (100–120 lbs) of concrete per hole.
How many rails (horizontal stringers) do I need?
A 4-foot fence requires 2 horizontal 2×4 rails (top and bottom). Fences 6 feet tall require 3 horizontal rails (top, middle, and bottom) to prevent picket warping and bowing. Fences 8 feet tall require 4 horizontal rails.
How many pickets do I need for a 6-foot wood privacy fence?
For standard 5.5-inch wide dog-ear pickets with a 1/8-inch expansion gap, plan for approximately 2.15 pickets per linear foot (roughly 17 pickets per 8-foot section). A 150-foot fence requires ~320–340 pickets including a 5% allowance for knots and split boards.
Do I need a building permit or HOA approval for a fence?
Most municipalities require a building permit for backyard fences exceeding 6 feet tall or front yard fences over 3.5–4 feet tall. Always call 811 before digging to mark buried utility lines, check property line setback requirements, and verify HOA material/color covenants.

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