Concrete for 20 Post Holes
Setting 20 posts in 10"-wide, 24"-deep holes takes about 41 60-lb bags of concrete (or 31 80-lb bags). Adjust the hole size and post width below.
Concrete bags
41 bags
Posts
2010" holes, 24" deep
Concrete per hole
0.92 cu fthole minus the post
60-lb bags
41 bagsor 31 × 80-lb bags
Cost (est.)
$226~$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.