Wood Fence Calculator
Use this wood fence calculator to estimate posts, rails, pickets, concrete bags, material cost, and optional labor. Enter the fence length, style, post spacing, gate details, board size, and prices.
Privacy style uses 0 picket gap for the board count.
Use the number of bags you expect per post hole. For hole depth and concrete volume, use the Fence Post Depth Calculator.
Results
Wood fence costs vary by lumber grade, gate layout, site conditions, and local labor. Labor is based on total fence length because per-foot installation pricing usually follows the full fence line, including gate openings.
How to use this calculator
- 01Enter the total fence length, height, post spacing, and gate details.
- 02Choose privacy or spaced picket style.
- 03Enter rails per section, picket width, waste, and concrete bags per post.
- 04Add material prices and labor cost per linear foot if you want a cost estimate.
- 05Read the posts, rails, pickets, concrete bags, material cost, labor cost, and total estimate.
Understanding the math
The calculator subtracts gate openings from the board run, then divides that run into post-spaced sections. Privacy style uses picket width as the effective spacing. Spaced picket style adds the visible gap to the picket width. Labor cost uses total fence length because per-foot installation pricing usually follows the full fence line.
Total gate width = gate count x gate width Adjusted fence run = max(total length - total gate width, 0) Sections = adjusted fence run / post spacing Posts = sections + 1 + gate count x 2 Rails = sections x rails per section Effective picket spacing = picket width, or picket width + gap Pickets to buy = pickets before waste x (1 + waste / 100) Labor cost = total fence length x labor rate
Example: a 100 ft privacy fence with one 4 ft gate has 96 ft of board run. With 8 ft post spacing, 5.5 in pickets, two rails per section, and 10 percent waste, the estimate is 12 sections, 15 posts, 24 rails, 238 pickets, and 15 concrete bags.
Wood fence quick reference
Use these wood fence values as a starting point, then adjust the calculator to match your lumber and site.
| Item | Value | Notes |
|---|---|---|
| Common privacy fence height | 6 ft | Check local fence height rules before ordering material |
| Common post spacing | 6 to 8 ft | Shorter spacing adds posts and stiffens the fence |
| Common picket width | 5.5 in | Use actual board width, not the nominal lumber name |
| Spaced picket gap | 1 to 3 in | Privacy style uses no gap in the picket count |
| Rails per section | 2 to 3 | Taller or heavier wood fences often use three rails |
| Default waste factor | 10% | Covers cuts, damaged boards, and layout changes |
| Labor cost basis | total fence length | Labor per linear foot usually follows the full installed fence line |
Frequently asked questions
How do you calculate how much wood you need for a fence?
Start with the full fence length, subtract gate openings for the picket run, then divide by post spacing to get sections. Posts are sections plus one, with two extra posts per gate. Rails are sections times rails per section. Pickets are based on board width for privacy fences, or board width plus gap for spaced picket fences.
How many fence posts do I need for 100 feet?
For a 100 ft fence with one 4 ft gate and 8 ft post spacing, the board run is 96 ft. That makes 12 sections, 13 line posts, and two gate posts, so the estimate is 15 posts.
How many pickets do I need for 100 feet?
For a 100 ft privacy fence with one 4 ft gate, 8 ft post spacing, 5.5 in pickets, and 10 percent waste, the estimate is 238 pickets. Spaced picket fences usually need fewer boards because each gap adds to the effective spacing.
How much does a 250 ft wooden fence cost?
Cost depends on post spacing, fence style, lumber prices, concrete, gates, and labor. Enter 250 ft as the fence length, add your local material prices, and add labor per linear foot if you want an installed-cost estimate.
How do you estimate wood fence price?
Estimate the posts, rails, pickets, and concrete bags first. Multiply each count by its unit price, then add labor cost based on total fence length if you are pricing installation. This calculator keeps hardware, stain, and post depth out of the estimate.
What is the difference between privacy and spaced picket fence material?
A privacy fence treats each board as touching or nearly touching the next board, so the board width sets the spacing. A spaced picket fence adds the visible gap to the board width, so each picket covers more run and the board count is lower.
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