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.
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.
Quickly find the concrete volume and bag estimates for a 14" x 14" x 24" footing. Includes cubic feet, cubic yards, 10% waste planning, and bag counts for 40‑, 60‑, and 80‑lb mixes.
Exact material takeoff for a 14" x 14" x 36" footing: 4.0833 cu ft (0.1512 yd³) raw, 4.4916 cu ft (0.1663 yd³) with 10% waste, plus planning bag counts.
Find the exact concrete volume (5.4444 cu ft / 0.2016 yd³), waste-adjusted planning volume, and suggested bag counts for a 14" x 14" x 48" footing to buy the right amount.
Exact material takeoff for a 16" x 16" x 24" square footing: 3.5556 cu ft (0.1317 yd³) per footing, planning volumes with 10% waste, and recommended bag counts.
How much concrete a 16" x 16" x 36" footing needs: exact volume in cubic feet and yards, waste-adjusted planning volumes, and recommended bag counts for 40‑, 60‑, and 80‑lb mixes.
Quickly find how much concrete a 16" × 16" × 48" footing uses, the cubic feet and yards, plus how many 40-, 60-, or 80-lb bags you'll need with a standard 10% waste allowance.
Exact volumes and planning estimates for a 16" × 20" × 24" footing: 4.4444 cu ft (0.1646 yd³) exact, with waste-adjusted planning values and bag counts included.
Quantities for a 16" × 20" × 36" rectangular footing: exact volume 6.6667 cu ft (0.2469 yd³), waste-adjusted planning totals (7.3334 cu ft / 0.2716 yd³), and suggested bag counts.
Exact volumes and bag quantities for a 16" x 20" x 48" footing, plus waste-adjusted planning totals and practical tips for using bagged concrete on small projects.
This page shows exactly how much concrete a 16" x 24" x 24" footing needs: 5.3333 cu ft (0.1975 yd³) plus a 10% waste plan and recommended bag counts for ordering.
Find exact concrete volume (8 cu ft, 0.2963 yd³), waste-adjusted totals, and recommended bag counts for a 16×24×36 footing. Practical guidance for single posts and small column footings.
Exact volume and planning totals for a 16" x 24" x 48" rectangular footing. Includes cubic feet, cubic yards, and bag counts adjusted for 10% waste for 40-, 60-, and 80-lb bags.
Exact volumes and planning bag counts for a single 20" x 20" x 24" concrete footing. Includes cubic feet, cubic yards, and waste-adjusted totals for 40-, 60-, and 80-pound bags.
Get the exact quantities for a 20" × 20" × 36" footing: 8.3333 cu ft (0.3086 yd³), 10% waste planning, and recommended bag counts for a small poured footing.
Exact volumes and planning bag counts for a 20" × 20" × 48" footing. See cubic feet, cubic yards, and suggested 40/60/80-lb bag totals with waste included.
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.
