Length100 ft, one 4 ft gate
Posts14 at 8 ft spacing
Concreteabout 66 bags of 50 lb mix
Hole12 in wide, 36 in deep
A privacy fence is mostly posts set straight and deep enough. Everything else hangs off them.
Materials (6 ft fence, 8 ft sections)
| Item | Amount |
|---|---|
| Posts (4x4, 8 ft long) | 13 line and corner posts plus 1 gate post: 14 |
| Rails | 2 per section: 24 |
| Pickets (5-1/2 in, 1/2 in gaps) | about 192 |
| Post concrete | about 66 bags of 50 lb fast-setting mix |
| Gravel | about 6 in in each hole |
Hole size follows Quikrete’s rule: 3 times the post width and 1/3 to 1/2 of the above-ground height, plus 6 in for gravel.
Steps
- Confirm the property line and permit or HOA rules. Call 811.
- Set corner and end posts first, then pull a string line for the others.
- Set posts in concrete and let them cure before hanging rails.
- Attach rails, then pickets, checking for plumb as you go.
Sources
- Quikrete: Setting Posts in Concrete (hole 3 times the post width, depth 1/3 to 1/2 of the above-ground post, plus 6 in)
- Quikrete Fast-Setting Concrete Mix data sheet (sets in 20 to 40 minutes)
Sources last checked 1 November 2026.
Calculators for this project
Frequently asked questions
How many posts for 100 ft of fence?
At 8 ft spacing with one gate, about 14.
