CONCRETE SLAB
CALCULATOR.

A 60lb bag of premix yields ~0.45 cubic feet. An 80lb bag yields ~0.6 cubic feet. So you need about 60 bags of 60lb (or 45 bags of 80lb) for one cubic yard.

For small slabs under 200 sqft, DIY with bags is workable. Above that, ready-mix delivery makes more sense. For anything over 400 sqft or any structural slab, hiring a pro is almost always cheaper than the DIY mistakes — especially because we own the rebar grid, vibration tools, and finishing equipment that make the slab last.

5-10% extra is standard. Sub-grade is rarely perfectly level and concrete tends to spill during pour. Better to have a small over-pour than to run out mid-job.

The install range is a real ballpark — actual quotes depend on access, excavation needs, existing slab demo, finish complexity, and site conditions. Our written quote will be itemized and final.

Fiber reinforcement is mixed into the concrete itself — cheapest and good for residential. Rebar grid (#3 or #4 bar at 18" centers) is stronger and required for heavier-load slabs. Both add a small cost; we recommend per use case.