Volume, rebar, bags, and trucks
Concrete & Masonry
Slab volume, thickened-edge footings, rebar grids, bag counts, and ready-mix truck loads with a live footprint diagram.
Master calculators
Preset pages
20×20 Garage Slab: 4 Inch vs 6 Inch
A 20 ft square garage pad at 4 in, with the comparison table repeating the takeoff at 6 in.
10×12 Shed Pad: Bags vs Ready-Mix
A small 10 by 12 ft shed pad where bagged concrete often beats the short-load fee.
24×30 Monolithic Shop Slab with Rebar
A 24 by 30 ft monolithic shop slab with a thickened edge and a 16 in rebar grid.
6×6 Hot Tub Pad, 6 Inch Reinforced
A small 6 ft square, 6 in pad with a tight rebar grid for a hot tub.
12×40 Concrete Driveway Thickness and Cost
A 12 by 40 ft driveway apron priced at 5 in, with 4 in and 6 in beside it.
30×40 Barn Slab at 6 Inches and 4,000 PSI
A 30 by 40 ft agricultural slab at 6 in with a 16 by 12 in turned-down edge.
16×16 Patio Slab at 4 Inches
A square 16 ft patio with a light #3 mat and low waste.
12×24 Carport Slab, 5 Inch, 18 Inch Grid
A single-bay carport pad, 5 in thick, with an 18 in rebar grid.
8×10 Generator Pad, 8 Inch, 5,000 PSI
A heavy 8 in equipment pad for a generator, with a #5 mat.
40×60 Monolithic Shop Slab with Turn-Down Footing
A large 40 by 60 ft monolithic slab with an 18 in deep turned-down edge.