Concrete for 12 Post Holes
Setting 12 posts in 10"-wide, 24"-deep holes takes about 25 60-lb bags of concrete (or 19 80-lb bags). Adjust the hole size and post width below.
Concrete bags
25 bags
Posts
1210" holes, 24" deep
Concrete per hole
0.92 cu fthole minus the post
60-lb bags
25 bagsor 19 × 80-lb bags
Cost (est.)
$138~$5.50/60-lb bag
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Want the full guide — tools, step-by-step, common mistakes and FAQ? See the Post-Hole Concrete Calculator.