How many fence posts do I need?
Count corners and gates first, then add line posts using your chosen spacing and brace needs.
Fence posts are easy to undercount because the layout is not just a long straight line. Corners, ends, and gates each need dedicated posts in addition to your regular line posts, and those special posts are often larger and set deeper than the rest. Plan for heavier posts and more concrete at terminals.
A reliable post count starts with a simple plan: sketch the fence, break it into straight runs, and decide your spacing based on the fence style or panel width. Then count posts run by run and make sure you understand which posts are shared (for example, a corner post serves two runs). If you are using panels, use the actual panel width, not the nominal size.
Step-by-step: post count
- Draw the fence layout and list each straight run between corners, ends, and gates. Measure run lengths along the property line where the fence will actually sit and mark all gate openings.
- Choose post spacing based on your fence type and manufacturer specs. Many fences use 6-8 ft on-center, but prebuilt panels often dictate the spacing more than preference (project dependent). Use the actual panel width after brackets or gaps.
- Count posts per run. A simple method is: number of spaces = ceiling(run length / spacing), then posts in that run = spaces + 1. If two runs meet at a corner, the corner post is shared, so do not double-count it. Adjust spacing slightly if you need an even fit.
- Add special posts: one corner post at each corner, end posts at any run endpoints that are not corners, and any brace/terminal posts your fence design requires (some styles need bracing at ends and corners). Plan braces now so you do not forget extra posts.
- Add gate posts. Most gates use two posts, and heavy or wide gates may need larger posts, deeper footings, or additional bracing. Include gate hardware and latch clearance in the plan so post spacing does not surprise you.
Practical tips
- Corner, end, and gate posts often carry more load than line posts. Many builds use larger posts and deeper holes at terminals, and that can also affect the amount of concrete you need (project dependent).
- Measure spacing on-center and confirm the actual panel width if you are using prebuilt panels. Small differences (like 6 ft vs 6 ft 8 in) can change the post count over a long run. Brackets and gaps change the true spacing.
- Slopes change the build. Stepped fences and grade changes can increase the number of short sections, which can increase posts and waste. Decide whether you will rack panels or step them before you lock spacing.
- Check local rules for frost depth, minimum post embedment, and footing details. The right depth can matter more for longevity than the exact spacing, especially in windy areas.
Fence post notes
Post count depends on layout: corners, ends, and gates add posts beyond simple length ÷ spacing. If you’re building gates, plan for heavier posts and additional bracing.
Concrete needs depend on hole diameter and depth; deeper frost lines can change your materials quickly.
- Verify spacing for your fence style (panels vs pickets).
- Plan extra for corners/ends and for any bracing or gate hardware.
- Check local code for depth and setback requirements.
Fence posts: spacing and corner rules
Post count is not just length ÷ spacing. Corners, ends, and gates create “extra” posts that should be planned explicitly.
| Spacing (typical) | When used | Reminder |
|---|---|---|
| 6 ft | Common for 6 ft panels | Match the panel system length |
| 8 ft | Common for 8 ft panels | Longer spans need straighter runs |
| Custom | Picket fences | Pickets still need posts at fixed spacing |
- Add posts for corners, ends, and each gate opening (often extra bracing too).
- Slopes can require stepping/racking, which changes layout and post planning.
- Depth matters: post length changes with fence height and embedment.
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