Reference tables
Look-up charts built from stable conventions — cubic yards & coverage per area by thickness, bag yield for 40/60/80 lb, installed cost per sq ft by flatwork type, the ready-mix $/yd³ band, rebar spacing & sub-base typicals, and slab thickness by use.
Typical industry planning values — NOT a structural/geotechnical design. A licensed engineer sizes load-bearing concrete, footings and reinforcement; confirm against your product’s spec sheet and local code.
Cubic yards & coverage per area by thicknessHow many cubic yards a slab takes and how much area 1 yd³ covers at 3", 4" and 6" — stable geometry, a look-up behind the concrete and slab calculators.Concrete bag yield (40, 60 & 80 lb)Typical ft³ yield and bags-per-cubic-yard for 40, 60 and 80 lb bags, as labeled conventions — behind the bags-of-concrete and concrete calculators.Concrete cost per sq ft by flatwork type (installed)Typical installed cost bands per sq ft by flatwork type (plain slab, driveway, patio, stamped, exposed-aggregate, colored, sidewalk), as labeled PLANNING bands — a sanity guide behind the cost tools.Ready-mix concrete cost per cubic yard (band)A labeled planning band for ready-mix $/yd³ plus a note on delivery and short-load fees — behind the cost-per-yard and ready-mix-vs-bags tools.Rebar spacing and sub-base depth typicalsTypical rebar spacing (12"–18" o.c., #3–#4 bar) and sub-base depth for residential flatwork, as labeled planning values — NOT a structural design.Concrete slab thickness by useTypical slab thickness by use (4" residential slab/patio/sidewalk, 4–5" garage/shed, 5–6" driveway/heavy), as labeled planning values — NOT a structural design.