14 by 10 ft slab at 8 inches
Calculate the requirements for a residential slab measuring 14 ft by 10 ft at 8 in thickness with #4 bars at 18 in spacing. Ensure compliance with IRC R506 standards.
Formula SSC-2026.1
Formula SSC-2026.1 · 4,000 PSI
Order volume
4.40 yd³
3.364 m³ placed+waste
Order weight
17,820 lb
8,083 kg
80 lb bags
198
5 pallets at 42 bags
60 lb bags
264
0.45 ft³ yield each
Rebar
294.00 ft
23 × 20 ft · 23 × 6 m · 216 lb
Ready-mix vs bags
$726.00
Truck $726.00 · 80 lb bags $1,336.50
Grid lines are equalized so the drawing stays readable. The order count uses on-center spacing with a bar at each end of the layout, then holds concrete cover in the field.
| Item | Net | Waste | Order | Unit price | Line total | Source Spec Material / Tool |
|---|---|---|---|---|---|---|
| Ready-mix concrete | 4.00 yd³ | 10% | 4.40 yd³ / 3.364 m³ | USD | $726.00 | Source Spec Material / Tool |
| Short-load fee | Full load | — | 1 truck @ 10 yd³ | USD | $0.00 | Source Spec Material / Tool |
| 80 lb pre-mix bags | 180.0 bags | 10% | 198 bags | USD | $1,336.50 | Source Spec Material / Tool |
| 60 lb pre-mix bags | 240.0 bags | 10% | 264 bags | USD | $1,425.60 | Source Spec Material / Tool |
| #4 rebar sticks, 20 ft | 23 sticks | 10% | 26 sticks / 23 × 6 m | USD | $364.00 | Source Spec Material / Tool |
| Rebar chairs | 70 crossings | 10% | 77 chairs | USD | $21.56 | Source Spec Material / Tool |
| Tie wire rolls | 70 ties | 10% | 1 rolls | USD | $8.00 | Source Spec Material / Tool |
Source links open a product search on the Amazon storefront for the selected currency. SiteSpecCalc may earn a commission. The link does not change the quantities above.
Ready-mix truck
$726.00
0.44 nominal 10 yd³ loads · 1 to order
80 lb bags
$1,336.50
60 lb alternative $1,425.60 · delivery weight 17,820 lb
| Thickness | Order yd³ | Order m³ | 80 lb bags | Rebar ft | Ready-mix | 80 lb cost |
|---|---|---|---|---|---|---|
| 4 in | 3.10 | 2.367 | 140 | 323 | $635.89 | $945.00 |
| 5 in | 3.42 | 2.616 | 154 | 323 | $689.67 | $1,039.50 |
| 6 in | 3.75 | 2.866 | 169 | 323 | $743.44 | $1,140.75 |
Show the deterministic formula
Slab ft³ = L × W × thickness ÷ 12. Thickened-edge extra = footing band × (footing depth − slab thickness), with corner squares counted once.
yd³ = ft³ ÷ 27. m³ = ft³ × 0.0283168. Weight uses 150 lb/ft³, then the header converts that pound total at 1 lb = 0.45359237 kg. 80 lb bags yield 0.6 ft³ and 60 lb bags yield 0.45 ft³. Currency changes the price labels only.
Bars across a span = floor(span ÷ spacing) + 1. Order sticks = that count, plus 10, 5, or 15 percent waste, cut from 20 ft and 6 m stock. Chairs = one per grid intersection.
Contractor sign-off
Project: 14 by 10 ft slab at 8 inches
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This sheet is an estimate for ordering and layout discussion. It is not a sealed design. Confirm the quantities with a licensed local professional and the authority having jurisdiction before you buy or build.
Engineering notes
This calculator is designed to assist in the preliminary design of a residential concrete slab measuring 14 ft by 10 ft and 8 inches thick, incorporating #4 rebar at 18-inch spacing. Please note that soil design considerations are excluded from this calculation.
Refer to the International Residential Code (IRC) R506 for guidelines on concrete slabs, including reinforcement and curing requirements.
Code reference
IRC R506
Field questions
- What is the purpose of using #4 bars in the slab?
- The #4 bars provide tensile strength to the concrete slab, helping to control cracking and improve overall structural integrity.
- Why is soil design excluded from this calculation?
- Soil design is site-specific and requires a geotechnical analysis to determine the appropriate foundation design based on soil conditions.
- What does IRC R506 cover?
- IRC R506 provides guidelines for the construction of concrete slabs, including specifications for materials, reinforcement, and curing practices.
- How do I ensure my slab meets local building codes?
- Consult with a licensed engineer or local building authority to verify that your slab design complies with all applicable codes and regulations.