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Free Tool
Fence Post Concrete Calculator
Nevada County installers often set posts 24 to 36 inches deep; rocky foothill sites may require narrower holes or additional bags. This tool estimates cubic volume per hole (π × radius² × depth) and converts to 60-pound ready-mix bags for your post count.
How this tool works
- Enter the number of fence posts you plan to set.
- Set hole diameter and depth—10 inches wide by 24 inches deep is a common residential default.
- Review total volume and 60-pound bag count before ordering concrete.
Assumptions & notes
- Calculations assume cylindrical post holes and 60-pound bags yielding roughly 0.45 cubic feet each.
- Rocky Grass Valley soil may require oversized holes or extra bags beyond this estimate.
- Frost depth and local code may require deeper footings on exposed sites—confirm before digging.
Frequently asked questions
How deep should fence posts be in Grass Valley?
Most residential posts are set 24 to 36 inches deep. Exposed wind loads, heavy gates, and sloped terrain often call for deeper footings than flat valley lots.
Can I use fast-setting concrete?
Yes—fast-setting mixes are popular for post-setting. Bag yield is similar; follow the manufacturer label for water ratio and set time.
What if I hit rock while digging?
Rocky footing is common in Nevada County foothills. You may need to relocate the hole slightly, pin to rock, or use a larger footing—this calculator cannot predict subsurface conditions.
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Phone (916) 906-2254
Grass Valley, CA — Serving Nevada County and nearby communities
- California contractor license #1089233
- Residential, commercial & agricultural fencing
- Warranty-backed workmanship — ask us for project details