Browse ready-made footing size pages for common rectangular and round footings. Compare volume, ready-mix totals, and bag estimates, then use the calculator only when your footing dimensions or count need custom changes.
Open the calculator when you need to change footing count, custom dimensions, or waste assumptions beyond the ready-made size pages.
Footing Calculator → All Project Pages → Guides Hub →Use this hub to browse common footing sizes, compare concrete volume quickly, and open ready-made pages that estimate cubic feet, cubic yards, and bag counts for each footing. It is built for fast planning when you want a size-based estimate without starting from scratch.
If you already know the footing dimensions, open the closest matching size page. If you need to adjust dimensions, footing count, or waste allowance, move to the footing calculator for a custom estimate.
Select a common footing size to filter pages instantly.
Estimate concrete and bag counts for a 12-inch diameter, 24-inch deep round footing. Exact volume, a 10% waste plan, and 40/60/80-lb bag totals are provided for quick ordering.
Estimate for a 12" diameter × 36" deep round Sonotube footing: exact volume 2.3562 cu ft (0.0873 yd³), exact bag counts, and planning quantities with 10% waste.
Exact volume and bag counts for a 12" diameter by 48" deep Sonotube-style footing: 3.1416 cu ft (0.1164 yd³). Includes planning numbers with a 10% waste allowance and bag totals.
Quick reference for a 12" x 12" x 24" square footing: 2 cubic feet (0.0741 yd³). Includes exact bag counts, 10% waste planning, and practical pouring tips.
Find exact volume and planning totals for a 12" x 12" x 36" footing: 3 cu ft (0.1111 yd³), waste-adjusted totals, and bag counts for 40-, 60-, and 80-lb mixes.
Calculate material for a single 12" × 12" × 48" concrete footing: exact volume in cu ft and yd³, plus planning numbers including 10% waste and bag counts for 40-, 60-, and 80-lb mixes.
Get the exact material takeoff for a 12" × 18" × 24" footing: 3.0 cu ft (0.1111 yd³) nominal, 3.3 cu ft (0.1222 yd³) with 10% waste, and bag planning counts included.
Exact materials for a 12" x 18" x 36" footing: 4.5 cubic feet (0.1667 yd³), waste-adjusted totals, and recommended 40/60/80 lb bag counts for planning.
Get exact material needs for a 12" x 18" x 48" footing: 6 cubic feet (0.2222 yd³), plus 10% waste planning and bag counts for 40‑, 60‑, and 80‑lb mixes.
A 12" x 24" x 24" footing holds 4.0 cubic feet (0.1481 yd³). This page gives exact volume, waste-adjusted planning quantities, and bag counts for ordering or on-site mixing.
Get the exact 6 cu ft (0.2222 yd³) volume for a 12×24×36 footing, plus 10% waste planning: 6.6 cu ft (0.2444 yd³) and bag counts for 40-, 60-, and 80-lb mixes.
See how a 12×24×48 footing equals 8 cubic feet (0.2963 yd³) of concrete and the planning totals with 10% waste—about 30 40-lb bags or 0.3259 cubic yards.
A footing page gives you a ready-made estimate for a common footing size, while the footing calculator is better when you need to change dimensions, footing count, or waste assumptions.
No. They are planning estimates. Final material needs can change with excavation shape, overdig, soil conditions, and the actual bag yield printed on the concrete mix you buy.
Bagged concrete often makes sense for one or a few smaller footings. As the number of footings and total volume rise, ready-mix may become more practical for labor, consistency, and total time.
The pages are designed for planning. You should still review the final total and add a sensible waste allowance based on excavation variation, spillage, and site conditions before ordering concrete.
Yes. They are useful as quick planning pages for common residential footing sizes, but final footing dimensions and depth still need to match the structural load, soil conditions, frost depth, and local code.
