How Much Concrete Do I Need for Fence Posts?
Each fence post needs a solid concrete footing to stay plumb and resist wind loads. The standard rule is 2 bags of 60-pound Quikrete per post, which fills a hole about 10 inches in diameter and 24 inches deep. For taller fences (6 ft+) or windy areas, go 30-36 inches deep and use 3 bags per post.
Quick Calculator
Posts
16
Concrete
32
Pickets
320
Rails
39
Est. Cost
$1,500–$2,500
Detailed Answer
The standard rule: 2 bags of 60-pound Quikrete per post for a hole 10 inches in diameter and 24 inches deep.
For taller fences (6ft+) or areas with high wind or frost, dig 30–36 inches deep and use 3 bags per post.
Quick math for 100 ft of wood privacy fence: - 16 posts × 2 bags = 32 bags of 60lb concrete - At ~$6 per bag = $192 in concrete
Pro tip: Fast-setting concrete (like Quikrete Fast-Setting) lets you set the post and attach rails within 20–40 minutes. No mixing required—just pour dry mix into the hole, add water, and hold the post level for 5 minutes.
Recommended Materials
Pressure-Treated Fence Post 4×4×8
Ground-contact rated, ideal for all fence types.
$12 – $18
Cedar Dog-Ear Picket 1×6×6
Naturally rot-resistant, smooth on one side.
$3 – $6
Quikrete 60 lb Fast-Setting Concrete
Sets in 20-40 minutes. No mixing required.
$5 – $7
Post Hole Digger – Fiberglass Handle
Heavy-duty clamshell digger for clean holes.
$35 – $55
Simpson Strong-Tie Fence Bracket
Galvanized L-bracket for rail-to-post connections.
$4 – $8
Decorative Post Cap 4×4
Copper-top cap, fits standard 4×4 posts.
$5 – $12