8 Ft Wood Fence Cost Calculator
Enter your fence length and this calculator works out posts (8 ft on-center spacing), rails (4 per section for an 8 ft tall fence), pickets, and a total material-plus-labor cost estimate based on 2026 lumber and installation pricing.
Quick Answer
Enter your fence length and this calculator works out posts (8 ft on-center spacing), rails (4 per section for an 8 ft tall fence), pickets, and a total material-plus-labor cost estimate based on 2026 lumber and installation pricing.
8 Ft Wood Fence Cost Calculator
Enter your values below for an instant result, then see the formula, worked example, and common mistakes.
Enter your fence length and click calculate.
How to Use This Calculator
Get the total linear footage of fence you plan to build, in a straight run or the sum of multiple straight runs for an L-shaped or enclosed yard.
8 ft on-center is the industry standard for wood fence, since dimensional lumber for rails is sold in 8 ft and 16 ft lengths and wider spacing risks sagging rails.
Fences under 5 ft typically use 2 rails per section, 5-7 ft fences use 3 rails, and 8 ft fences use 4 rails to resist wind load and sagging.
Check your local lumber yard or home center for current per-unit prices on posts, rails, and pickets — these vary by wood species (pine, cedar, redwood) and by region.
Labor typically makes up 40-50% of total project cost; set labor to $0 to see a DIY materials-only estimate.
Formula
Posts = (Fence length / 8) rounded up, + 1. Rails = number of 8 ft sections x 4 (for an 8 ft tall fence). Pickets = Fence length x (12 / picket width in inches), rounded up.
Total cost = (posts x post price + rails x rail price + pickets x picket price + posts x concrete price) + (fence length x labor price per foot).
Reference Table: 2026 Wood Fence Cost by Species (Per Linear Foot, Installed)
| Wood type | Typical installed cost/linear ft |
|---|---|
| Pressure-treated pine | $25-$35 |
| Cedar | $25-$55 |
| Redwood | $40-$60 |
| National average (all wood) | $44-$67 (avg. ~$54) |
Common Mistakes to Avoid
- Using 6-ft rail spacing math for an 8-ft-tall fence — taller fences need 4 rails per section (not 2-3) to resist wind load and prevent sagging.
- Forgetting to add 1 extra post beyond the number of sections (a 100 ft fence with 13 sections needs 14 posts, not 13).
- Skipping concrete in the budget — each post typically needs about one 50 lb bag of concrete to set properly.
- Comparing a DIY materials-only quote against a contractor’s all-in quote — labor is 40-50% of the total installed cost, so the numbers won’t match unless you’re comparing like for like.
When the Estimate May Be Wrong
This calculator assumes a straight fence run with standard 8 ft post spacing and does not account for gates, corner posts (which need bracing), sloped terrain (which needs stepped or racked panels), or removal/disposal of an old fence — all of which add cost. Get a local contractor quote for accurate labor pricing in your area, since labor rates vary significantly by region.
FAQs
How much does an 8 ft wood fence cost per linear foot?
Nationally, wood fences average $44-$67 per linear foot installed in 2026, though pressure-treated pine can run as low as $25/ft and premium redwood can exceed $60/ft.
How many posts do I need for a wood fence?
Divide your fence length by 8 (standard post spacing), round up to get the number of sections, then add 1 post. A 100 ft fence needs 14 posts.
How many rails does an 8 ft tall fence need?
4 rails per section is standard for 8 ft tall fences, compared to 2-3 rails for shorter fences, because taller panels carry more wind load.
Is it cheaper to build a wood fence myself?
Yes — labor typically accounts for 40-50% of total installed cost, so a DIY build using only materials can cut your total cost roughly in half, though it requires tools, time, and physical effort.
Sources and Methodology
Post spacing (8 ft on-center) and rail-count-by-height guidance sourced from fence industry installation standards (Inch Calculator fence calculator, Hoover Fence Co., NMI Fence post spacing guides). 2026 per-linear-foot cost ranges sourced from Homewyse, Ergeon, and Angi 2026 wood fence cost data.
