Concrete Calculators — Yards, Bags & Rebar for Every Pour
Four calculators, one pour: volume first (slab, footing, or pier), then the bag-or-truck decision, then the rebar grid that goes inside it. Every calculator converts to what you actually order — cubic yards at the plant, 80-lb bags at the store, 20-foot sticks of #4 at the supplier.
More Concrete Calculators
Concrete Slab Calculator
Enter slab length, width, and thickness — get cubic yards, 80-lb bag count, and a cost ballpark. Built for shed pads, patios, and garage floors.
Concrete Footing Calculator
Continuous footings and round pier pads: enter dimensions and get cubic yards plus bag counts, sized for deck footings and frost-depth trenches.
Concrete Bag Calculator
Work backwards: enter the volume you need in cubic yards or feet and get exactly how many 80, 60, or 40-lb bags to buy — pallet math included.
Rebar Calculator
Slab rebar grid: enter dimensions, spacing, and bar size — get bar count per direction, total linear feet, 20-ft sticks, and weight.