Planning result
For a straight 100 ft fence with 8 ft maximum post spacing, plan 13 sections and 14 posts before gates. With two rails across the run, plan 200 linear feet of rail. With a 6 inch picket module, plan about 200 pickets before extras.
Assumptions
| Fence length | 100 ft straight run with no gates included. |
|---|---|
| Post spacing | 8 ft maximum spacing. |
| Rails | Two horizontal rails across the full run. |
| Pickets | 5.5 inch picket plus 0.5 inch gap, or 0.5 ft per module. |
Calculation
| Step | Result | Formula |
|---|---|---|
| Sections | 13 sections | 100 / 8 rounded up |
| Posts | 14 posts | 13 sections + 1 |
| Rail length | 200 linear ft | 100 x 2 rails |
| Pickets | 200 pickets | 100 / 0.5 |
| Concrete per post | 1.36 cubic ft | 10 inch diameter x 30 inch deep hole, rough |
| 80 lb concrete bags | 35 bags | 14 holes x 1.36 / 0.6 plus waste, rounded |
Place gates first
Gate posts and openings change the number of line posts, rails, pickets, hardware, and concrete. Add gates before finalizing the shopping list.
Picket spacing drives count
Changing the picket width or gap changes the picket count. Use the actual product width and desired gap.
Next step
Use the linked calculator or planning hub to adjust dimensions, waste, coverage, depth, spacing, or product packaging for the real project.
Related guides
FAQ
How many posts for 100 feet of fence?
With 8 ft maximum spacing, this straight-run example uses 14 posts.
How many pickets for 100 feet?
With a 6 inch module, plan about 200 pickets before extras.
Does this include a gate?
No. Gates should be laid out separately before final material count.