14 by 16 ft slab at 6 inches
Calculate the specifications for a residential slab measuring 14 ft by 16 ft at 6 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
5.70 yd³
4.361 m³ placed+waste
Order weight
23,100 lb
10,478 kg
80 lb bags
257
7 pallets at 42 bags
60 lb bags
343
0.45 ft³ yield each
Rebar
434.00 ft
27 × 20 ft · 29 × 6 m · 319 lb
Ready-mix vs bags
$941.11
Truck $941.11 · 80 lb bags $1,734.75
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 | 5.19 yd³ | 10% | 5.70 yd³ / 4.361 m³ | USD | $941.11 | 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 | 233.3 bags | 10% | 257 bags | USD | $1,734.75 | Source Spec Material / Tool |
| 60 lb pre-mix bags | 311.1 bags | 10% | 343 bags | USD | $1,852.20 | Source Spec Material / Tool |
| #4 rebar sticks, 20 ft | 27 sticks | 10% | 30 sticks / 29 × 6 m | USD | $420.00 | Source Spec Material / Tool |
| Rebar chairs | 110 crossings | 10% | 121 chairs | USD | $33.88 | Source Spec Material / Tool |
| Tie wire rolls | 110 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
$941.11
0.57 nominal 10 yd³ loads · 1 to order
80 lb bags
$1,734.75
60 lb alternative $1,852.20 · delivery weight 23,100 lb
| Thickness | Order yd³ | Order m³ | 80 lb bags | Rebar ft | Ready-mix | 80 lb cost |
|---|---|---|---|---|---|---|
| 4 in | 4.56 | 3.489 | 206 | 477 | $752.89 | $1,390.50 |
| 5 in | 5.13 | 3.925 | 231 | 477 | $847.00 | $1,559.25 |
| 6 in | 5.70 | 4.361 | 257 | 477 | $941.11 | $1,734.75 |
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 16 ft slab at 6 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 slab measuring 14 ft by 16 ft with a thickness of 6 inches. The use of #4 rebar at 18-inch spacing is specified for reinforcement, ensuring adequate structural integrity.
Please note that soil design considerations are excluded from this calculation. It is essential to consult with a qualified engineer for site-specific soil analysis and compliance with local codes.
Code reference
IRC R506 - Concrete Floors on Ground
Field questions
- What is the purpose of using #4 bars in the slab?
- The #4 bars provide reinforcement to the concrete slab, helping to control cracking and improve load-bearing capacity.
- Why is soil design excluded from this calculator?
- Soil design is site-specific and requires a thorough analysis by a qualified engineer to ensure proper load distribution and stability.
- What does IRC R506 cover?
- IRC R506 provides guidelines for the design and construction of concrete floors on the ground, including reinforcement requirements and thickness specifications.
- Can I use this calculator for commercial slabs?
- This calculator is intended for residential slabs only. For commercial applications, consult a structural engineer for appropriate design and compliance.