Sheet set S · Structural
Concrete
Slabs, footings, columns and walls — yards, bags, truck loads and cost.
Issued
4 of 6Concrete Calculator
Cubic yards, bags, truck loads and weight for a slab, with multiple sections and an optional thickened edge.
Open sheet → S-102Rebar Calculator
Bar count each way, lap splices carried into the total length and into the order, stock bars packed into 20, 40 or 60 ft, weight, intersections and supports, for a slab grid or a continuous footing.
Open sheet → S-103Footing Calculator
Footing concrete from the building's own footprint: a continuous footing measured on its centreline so the four corners are not poured twice, plus isolated pads and round piers, added into one order in cubic yards or bags.
Open sheet → G-201Concrete Cost Calculator
Your own delivered price per cubic yard applied to the quarter-yard order quantity, with short-load fee, delivery, and bags against ready-mix.
Open sheet →In the set, not issued
Column & Sonotube Calculator
Round and square column volume, tube diameter chart, bags per pier.
Not issuedConcrete Wall Calculator
Wall volume with openings deducted, form area and ties.
Not issuedQuick reference
| Bag | Yield | Bags per cubic yard |
|---|---|---|
| 90 lb | 0.675 cu ft | 40 |
| 80 lb | 0.6 cu ft | 45 |
| 60 lb | 0.45 cu ft | 60 |
| 50 lb | 0.375 cu ft | 72 |
| 40 lb | 0.3 cu ft | 90 |
| Use | Common thickness |
|---|---|
| Patio, walkway, shed floor | 4″ |
| Residential driveway, cars and light trucks | 4″–5″ |
| Driveway with RV, dump trailer, delivery trucks | 5″–6″ |
| Garage and workshop floor | 4″–6″ |
| Detached garage / shop slab-on-grade with turndown | 4″ field + 12″–16″ turndown |
| Light commercial floor, forklift traffic | 6″+ |
These are common practice, not code. Thickness, reinforcement and base depth for your job come from your drawings, your engineer and your local building department.