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Free Tool
Fence Post Concrete Calculator
Folsom installers often set posts 24 to 30 inches deep; buried granite near the lake and river corridor 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 ground near Folsom Lake and the American River may require oversized holes or extra bags.
- Local code may require specific footing depth on graded or engineered-fill lots—confirm before digging.
Frequently asked questions
How deep should fence posts be in Folsom?
Most residential posts are set 24 to 30 inches deep. Heavy gates, exposed sites, and engineered-fill lots often call for deeper footings than a standard flat lot.
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?
Buried granite is common near Folsom Lake and the American River corridor. 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
Folsom, CA — Serving Folsom and nearby Sacramento-area communities
- California contractor license #1089233
- Residential & light commercial fencing
- Warranty-backed workmanship — ask us for project details