Wood Fence Picket, Post & Rail Calculator

Q: How many pickets do I need for a 100 or 150 foot wood fence?

For standard 5.5-inch dog-ear pickets with zero gap (solid privacy), 100 linear feet requires 230 pickets (including 5% waste). A 150-foot fence requires 344 pickets, and a 200-foot fence requires 459 pickets.

Q: Should a 6-foot wood fence have 2 or 3 horizontal rails?

A 6-foot wood fence should always have 3 horizontal 2x4 rails (top, center, and bottom). Using only 2 rails on a 6-foot fence causes pickets to cup, twist, and pull away from screws in direct sunlight.

Q: What is better for fence posts: Cedar or Pressure-Treated Pine?

Pressure-treated Southern Yellow Pine (ground contact rated UC4A) is significantly better for in-ground posts because modern chemical treatment resists subterranean rot longer than raw cedar. However, Western Red Cedar is superior for above-ground pickets and rails because it does not twist or shrink.

Q: How much gap should be left between wood fence pickets?

For pressure-treated pine pickets, install them tight with 0 gap because wet treated lumber shrinks approximately 1/8 to 1/4 inch as it dries in the sun. For kiln-dried cedar, leave a 1/16 to 1/8 inch gap to allow for natural swelling during humid rainy seasons.

Q: How much does a 150-ft wood fence cost to build in 2026?

In 2026, DIY materials for a 150-foot pressure-treated pine privacy fence cost between $1,700 and $2,200. Professional contractor installation ranges from $3,600 to $5,100 ($24 to $34 per linear foot installed).

Calculate exact cedar or pine pickets, 4x4 posts, 2x4 rails, concrete bags, and itemized lumber pricing with live framing elevation.

100% Free & Instant 5% Cut Waste Factored Printable Lumber List Included

Fence Dimensions & Lumber Specs Default: 150 LF Privacy (6 ft)

Itemized Lumber Takeoff Lumber List

Total Pickets

344 pickets

328 net + 5% waste

4x4 Fence Posts

20 posts

18 line + 2 terminal

2x4 Rails (8-ft)

57 rails

3 rails × 19 bays

Total Lumber Cost

$1,840

Installed: $3,680 – $5,120

Bay elevation: 4x4 treated posts, 3 horizontal 2x4 rails, and 5.5" dog-ear privacy pickets.

Lumber Item	Quantity	Unit Price	Subtotal
Dog-Ear Pickets (1×6×6')	344 pickets	$2.75 / ea	$946.00
Treated Posts (4×4×8')	20 posts	$13.50 / ea	$270.00
Horizontal Rails (2×4×8')	57 rails	$5.85 / ea	$333.45
Fast-Setting Concrete (50-lb)	38 bags	$6.50 / bag	$247.00
Exterior Screws & Hardware	2 boxes (5-lb)	$21.75 / box	$43.50
Total Materials Subtotal	—	—	$1,840.00

How the Wood Fence Materials Are Calculated

Step-by-step engineering calculation formulas matching your active layout parameters:

Lumber Takeoff Formulas

Step 1 — Post Count & Spacing Bays:
Bays = ⌈Length (150 LF) ÷ 8 ft⌉ = 19 bays. Posts = 19 + 1 end post = 20 posts (18 line, 2 terminal)
Step 2 — 2x4 Horizontal Rails (3 Rails per Bay):
Rails = 19 bays × 3 rails per bay = 57 rails (8-ft length)
Step 3 — Picket Count (w/ 5% Cutting Waste):
Net Pickets = (150 LF × 12") ÷ (5.5" width + 0" gap) = 1,800 ÷ 5.5 = 327.3. Total w/ 5% waste = ⌈327.3 × 1.05⌉ = 344 pickets
Step 4 — Fast-Setting Concrete (2 bags per 10" hole):
Concrete Bags = 20 posts × 2 bags = 40 bags (adjusted to 38 bags based on 1.9 bags/hole)
Step 5 — Total Materials Subtotal:
Lumber = Pickets ($946.00) + Posts ($270.00) + Rails ($333.45) + Concrete ($247.00) + Screws ($43.50) = $1,840.00

2026 Wood Fence Species & Pricing Guide

Comparing popular lumber species, durability ratings, warping resistance, and unit costs.

Lumber Species	Picket Cost (1x6x6')	Post Cost (4x4x8')	Installed Cost / LF	Expected Lifespan	Warping / Shrinkage Risk
Pressure-Treated Southern Pine	$2.50 – $3.25	$12.00 – $15.50	$23.00 – $34.00	15 – 20 Years	High (Must be screwed tight)
Western Red Cedar (#2 Clear)	$4.50 – $6.50	$22.00 – $32.00	$32.00 – $46.00	20 – 25 Years	Low (Naturally stable)
Japanese Sugi / Red Cedar	$3.75 – $4.85	$18.00 – $24.00	$28.00 – $39.00	18 – 22 Years	Low to Moderate
Redwood (Heartwood)	$6.00 – $9.50	$28.00 – $42.00	$42.00 – $60.00	25+ Years	Very Low (Premium aesthetic)

Frequently Asked Questions About Wood Fencing

Technical guidelines for builders and DIY homeowners.

How many pickets do I need for a 100 or 150 foot wood fence?

For standard 5.5-inch dog-ear pickets with zero spacing gap, calculating for a 100-foot fence yields 218 net pickets; factoring in 5% waste equals 230 pickets. A 150-foot fence requires 344 pickets, and a 200-foot run requires 459 pickets.

Should a 6-foot wood fence have 2 or 3 horizontal rails?

A 6-foot fence should always have 3 horizontal rails. A bottom rail (8 inches off the ground), a middle rail (centered at 36 inches), and a top rail (8 inches below the picket caps). Installing only 2 rails on a 6-foot fence is a common shortcut that leads to warped and bowed pickets within two summers.

What is better for fence posts: Cedar or Pressure-Treated Pine?

Pressure-treated pine (rated for ground contact) is superior for the below-ground posts because modern chemical preservatives protect against fungal rot and termites better than sapwood cedar. However, Western Red Cedar is vastly superior for above-ground pickets because it does not twist or split.

How much gap should be left between wood fence pickets?

For wet, pressure-treated pine pickets fresh from the lumber yard, install them touching edge-to-edge with 0 gap. As the wood cures in the sun, it will shrink by approximately 1/8 to 1/4 inch, leaving natural privacy gaps. For kiln-dried cedar, leave a small 1/16-inch gap to allow for wet weather expansion.

How much does a 150-ft wood fence cost to build in 2026?

In 2026, purchasing the raw materials (pickets, posts, rails, concrete, and screws) for a 150-foot pressure-treated pine privacy fence costs between $1,700 and $2,200. Hiring a professional contractor to auger the holes, set posts in concrete, and build the fence averages $3,600 to $5,100 total.